diff --git a/dlls/msvcirt/tests/msvcirt.c b/dlls/msvcirt/tests/msvcirt.c
index 10056217ecf..70fbb6afb4f 100644
--- a/dlls/msvcirt/tests/msvcirt.c
+++ b/dlls/msvcirt/tests/msvcirt.c
@@ -5425,21 +5425,21 @@ static void test_istream(void)
     pis = call_func2(p_istream_seekg, &is1, 0);
     ok(pis == &is1, "wrong return, expected %p got %p\n", &is1, pis);
     ok(fb1.base.gptr == NULL, "wrong get pointer, expected %p got %p\n", NULL, fb1.base.gptr);
-    ok(_tell(fb1.fd) == 0, "expected 0 got %d\n", _tell(fb1.fd));
+    ok(_tell(fb1.fd) == 0, "expected 0 got %ld\n", _tell(fb1.fd));
     if (0) /* crashes on native */
         is1.base_ios.sb = NULL;
     pis = call_func2(p_istream_seekg, &is1, -5);
     ok(pis == &is1, "wrong return, expected %p got %p\n", &is1, pis);
     ok(is1.base_ios.state == IOSTATE_failbit, "expected %d got %d\n", IOSTATE_failbit, is1.base_ios.state);
     ok(fb1.base.gptr == NULL, "wrong get pointer, expected %p got %p\n", NULL, fb1.base.gptr);
-    ok(_tell(fb1.fd) == 0, "expected 0 got %d\n", _tell(fb1.fd));
+    ok(_tell(fb1.fd) == 0, "expected 0 got %ld\n", _tell(fb1.fd));
     fb1.base.epptr = fb1.base.ebuf;
     pis = call_func2(p_istream_seekg, &is1, 5);
     ok(pis == &is1, "wrong return, expected %p got %p\n", &is1, pis);
     ok(is1.base_ios.state == IOSTATE_failbit, "expected %d got %d\n", IOSTATE_failbit, is1.base_ios.state);
     ok(fb1.base.gptr == NULL, "wrong get pointer, expected %p got %p\n", NULL, fb1.base.gptr);
     ok(fb1.base.epptr == NULL, "wrong put end, expected %p got %p\n", NULL, fb1.base.epptr);
-    ok(_tell(fb1.fd) == 5, "expected 5 got %d\n", _tell(fb1.fd));
+    ok(_tell(fb1.fd) == 5, "expected 5 got %ld\n", _tell(fb1.fd));
     is1.base_ios.state = IOSTATE_goodbit;
     fd = fb1.fd;
     fb1.fd = -1;
@@ -5466,7 +5466,7 @@ static void test_istream(void)
     ok(pis == &is1, "wrong return, expected %p got %p\n", &is1, pis);
     ok(is1.base_ios.state == IOSTATE_failbit, "expected %d got %d\n", IOSTATE_failbit, is1.base_ios.state);
     ok(fb1.base.gptr == NULL, "wrong get pointer, expected %p got %p\n", NULL, fb1.base.gptr);
-    ok(_tell(fb1.fd) == 24, "expected 24 got %d\n", _tell(fb1.fd));
+    ok(_tell(fb1.fd) == 24, "expected 24 got %ld\n", _tell(fb1.fd));
 
     /* sync */
     ret = (int) call_func1(p_istream_sync, &is1);
diff --git a/dlls/msvcrt/tests/file.c b/dlls/msvcrt/tests/file.c
index 8c6df2e8e2b..61f6ffe373b 100644
--- a/dlls/msvcrt/tests/file.c
+++ b/dlls/msvcrt/tests/file.c
@@ -1185,7 +1185,7 @@ static void test_file_write_read( void )
 
   memset(btext, 0, LLEN);
   tempfd = _open(tempf,_O_APPEND|_O_RDWR); /* open for APPEND in default mode */
-  ok(tell(tempfd) == 0, "bad position %u expecting 0\n", tell(tempfd));
+  ok(tell(tempfd) == 0, "bad position %lu expecting 0\n", tell(tempfd));
   ok(_read(tempfd,btext,LLEN) == lstrlenA(mytext), "_read _O_APPEND got bad length\n");
   ok( memcmp(mytext,btext,strlen(mytext)) == 0, "problems with _O_APPEND _read\n");
   _close(tempfd);
@@ -1206,15 +1206,15 @@ static void test_file_write_read( void )
   _lseek(tempfd, -3, FILE_END);
   ret = _read(tempfd,btext,1);
   ok(ret == 1 && *btext == 'e', "_read expected 'e' got \"%.*s\" bad length: %d\n", ret, btext, ret);
-  ok(tell(tempfd) == 41, "bad position %u expecting 41\n", tell(tempfd));
+  ok(tell(tempfd) == 41, "bad position %lu expecting 41\n", tell(tempfd));
   _lseek(tempfd, -3, FILE_END);
   ret = _read(tempfd,btext,2);
   ok(ret == 1 && *btext == 'e', "_read expected 'e' got \"%.*s\" bad length: %d\n", ret, btext, ret);
-  ok(tell(tempfd) == 42, "bad position %u expecting 42\n", tell(tempfd));
+  ok(tell(tempfd) == 42, "bad position %lu expecting 42\n", tell(tempfd));
   _lseek(tempfd, -3, FILE_END);
   ret = _read(tempfd,btext,3);
   ok(ret == 2 && *btext == 'e', "_read expected 'e' got \"%.*s\" bad length: %d\n", ret, btext, ret);
-  ok(tell(tempfd) == 43, "bad position %u expecting 43\n", tell(tempfd));
+  ok(tell(tempfd) == 43, "bad position %lu expecting 43\n", tell(tempfd));
    _close(tempfd);
 
   ret = unlink(tempf);
@@ -1469,7 +1469,7 @@ static void test_file_inherit( const char* selfname )
     arg_v[3] = buffer; sprintf(buffer, "%d", fd);
     arg_v[4] = 0;
     _spawnvp(_P_WAIT, selfname, arg_v);
-    ok(tell(fd) == 8, "bad position %u expecting 8\n", tell(fd));
+    ok(tell(fd) == 8, "bad position %lu expecting 8\n", tell(fd));
     lseek(fd, 0, SEEK_SET);
     ok(read(fd, buffer, sizeof (buffer)) == 8 && memcmp(buffer, "Success", 8) == 0, "Couldn't read back the data\n");
     close (fd);
@@ -1482,7 +1482,7 @@ static void test_file_inherit( const char* selfname )
     arg_v[3] = buffer; sprintf(buffer, "%d", fd);
     arg_v[4] = 0;
     _spawnvp(_P_WAIT, selfname, arg_v);
-    ok(tell(fd) == 0, "bad position %u expecting 0\n", tell(fd));
+    ok(tell(fd) == 0, "bad position %lu expecting 0\n", tell(fd));
     ok(read(fd, buffer, sizeof (buffer)) == 0, "Found unexpected data (%s)\n", buffer);
     close (fd);
     ok(unlink("fdopen.tst") == 0, "Couldn't unlink\n");
diff --git a/dlls/msvcrt/tests/misc.c b/dlls/msvcrt/tests/misc.c
index afc3a9de212..d77b6c8edfe 100644
--- a/dlls/msvcrt/tests/misc.c
+++ b/dlls/msvcrt/tests/misc.c
@@ -240,7 +240,7 @@ static void test__get_doserrno(void)
     errno = EBADF;
     ret = p_get_doserrno(NULL);
     ok(ret == EINVAL, "Expected _get_doserrno to return EINVAL, got %d\n", ret);
-    ok(_doserrno == ERROR_INVALID_CMM, "Expected _doserrno to be ERROR_INVALID_CMM, got %d\n", _doserrno);
+    ok(_doserrno == ERROR_INVALID_CMM, "Expected _doserrno to be ERROR_INVALID_CMM, got %ld\n", _doserrno);
     ok(errno == EBADF, "Expected errno to be EBADF, got %d\n", errno);
 
     _doserrno = ERROR_INVALID_CMM;
@@ -287,19 +287,19 @@ static void test__set_doserrno(void)
     ret = p_set_doserrno(ERROR_FILE_NOT_FOUND);
     ok(ret == 0, "Expected _set_doserrno to return 0, got %d\n", ret);
     ok(_doserrno == ERROR_FILE_NOT_FOUND,
-       "Expected _doserrno to be ERROR_FILE_NOT_FOUND, got %d\n", _doserrno);
+       "Expected _doserrno to be ERROR_FILE_NOT_FOUND, got %ld\n", _doserrno);
 
     _doserrno = ERROR_INVALID_CMM;
     ret = p_set_doserrno(-1);
     ok(ret == 0, "Expected _set_doserrno to return 0, got %d\n", ret);
     ok(_doserrno == -1,
-       "Expected _doserrno to be -1, got %d\n", _doserrno);
+       "Expected _doserrno to be -1, got %ld\n", _doserrno);
 
     _doserrno = ERROR_INVALID_CMM;
     ret = p_set_doserrno(0xdeadbeef);
     ok(ret == 0, "Expected _set_doserrno to return 0, got %d\n", ret);
     ok(_doserrno == 0xdeadbeef,
-       "Expected _doserrno to be 0xdeadbeef, got %d\n", _doserrno);
+       "Expected _doserrno to be 0xdeadbeef, got %ld\n", _doserrno);
 }
 
 static void test__set_errno(void)
diff --git a/dlls/msvcrt/tests/time.c b/dlls/msvcrt/tests/time.c
index 45ed971ca89..0a14e64ec61 100644
--- a/dlls/msvcrt/tests/time.c
+++ b/dlls/msvcrt/tests/time.c
@@ -150,21 +150,21 @@ static void test_gmtime(void)
 
     gmt_tm->tm_wday = gmt_tm->tm_yday = 0;
     gmt = p_mkgmtime32(gmt_tm);
-    ok(gmt == valid, "gmt = %u\n", gmt);
+    ok(gmt == valid, "gmt = %lu\n", gmt);
     ok(gmt_tm->tm_wday == 4, "gmt_tm->tm_wday = %d\n", gmt_tm->tm_wday);
     ok(gmt_tm->tm_yday == 0, "gmt_tm->tm_yday = %d\n", gmt_tm->tm_yday);
 
     gmt_tm->tm_wday = gmt_tm->tm_yday = 0;
     gmt_tm->tm_isdst = -1;
     gmt = p_mkgmtime32(gmt_tm);
-    ok(gmt == valid, "gmt = %u\n", gmt);
+    ok(gmt == valid, "gmt = %lu\n", gmt);
     ok(gmt_tm->tm_wday == 4, "gmt_tm->tm_wday = %d\n", gmt_tm->tm_wday);
     ok(gmt_tm->tm_yday == 0, "gmt_tm->tm_yday = %d\n", gmt_tm->tm_yday);
 
     gmt_tm->tm_wday = gmt_tm->tm_yday = 0;
     gmt_tm->tm_isdst = 1;
     gmt = p_mkgmtime32(gmt_tm);
-    ok(gmt == valid, "gmt = %u\n", gmt);
+    ok(gmt == valid, "gmt = %lu\n", gmt);
     ok(gmt_tm->tm_wday == 4, "gmt_tm->tm_wday = %d\n", gmt_tm->tm_wday);
     ok(gmt_tm->tm_yday == 0, "gmt_tm->tm_yday = %d\n", gmt_tm->tm_yday);
 
@@ -177,13 +177,13 @@ static void test_gmtime(void)
 
     gmt_tm->tm_isdst = -1;
     gmt = p_mkgmtime32(gmt_tm);
-    ok(gmt == valid, "gmt = %u\n", gmt);
+    ok(gmt == valid, "gmt = %lu\n", gmt);
     ok(gmt_tm->tm_wday == 6, "gmt_tm->tm_wday = %d\n", gmt_tm->tm_wday);
     ok(gmt_tm->tm_yday == 2, "gmt_tm->tm_yday = %d\n", gmt_tm->tm_yday);
 
     gmt_tm->tm_isdst = 1;
     gmt = p_mkgmtime32(gmt_tm);
-    ok(gmt == valid, "gmt = %u\n", gmt);
+    ok(gmt == valid, "gmt = %lu\n", gmt);
 
     if(!p_gmtime32_s) {
         win_skip("Skipping _gmtime32_s tests\n");
diff --git a/include/msvcrt/corecrt.h b/include/msvcrt/corecrt.h
index ea81e95db36..3532cbf5019 100644
--- a/include/msvcrt/corecrt.h
+++ b/include/msvcrt/corecrt.h
@@ -163,8 +163,13 @@
 #ifndef _MSVCRT_LONG_DEFINED
 #define _MSVCRT_LONG_DEFINED
 /* we need 32-bit longs even on 64-bit */
+#ifdef __LP64__
 typedef int __msvcrt_long;
 typedef unsigned int __msvcrt_ulong;
+#else
+typedef long __msvcrt_long;
+typedef unsigned long __msvcrt_ulong;
+#endif
 #endif
 
 #ifndef _INTPTR_T_DEFINED