diff --git a/dlls/winmm/mci.c b/dlls/winmm/mci.c
index 0fcccec6d0b..822b1c0116a 100644
--- a/dlls/winmm/mci.c
+++ b/dlls/winmm/mci.c
@@ -978,7 +978,7 @@ static	BOOL		MCI_GetDWord(DWORD* data, LPWSTR* ptr)
     DWORD	val;
     LPWSTR	ret;
 
-    val = strtoulW(*ptr, &ret, 0);
+    val = strtoulW(*ptr, &ret, 10);
 
     switch (*ret) {
     case '\0':	break;
diff --git a/dlls/winmm/tests/mci.c b/dlls/winmm/tests/mci.c
index cb6df72b828..91a3e477f1a 100644
--- a/dlls/winmm/tests/mci.c
+++ b/dlls/winmm/tests/mci.c
@@ -249,6 +249,9 @@ static void test_mciParser(HWND hwnd)
     err = mciSendString("status x 2 track 3", buf, sizeof(buf), NULL);
     todo_wine ok(err==MCIERR_OUTOFRANGE,"status 2(position) track 3: %s\n", dbg_mcierr(err));
 
+    err = mciSendString("status x 0x4", buf, sizeof(buf), NULL);
+    todo_wine ok(err==MCIERR_BAD_CONSTANT, "status 0x4: %s\n", dbg_mcierr(err));
+
     err = mciSendString("status x 4", buf, sizeof(buf), hwnd);
     ok(!err,"status 4(mode): %s\n", dbg_mcierr(err));
     if(!err)ok(!strcmp(buf,"stopped"), "status 4(mode), got: %s\n", buf);
@@ -874,6 +877,9 @@ static void test_playWAVE(HWND hwnd)
     ok(!err,"mci seek to 250 wait notify returned %s\n", dbg_mcierr(err));
     test_notification(hwnd,"seek wait notify",MCI_NOTIFY_SUCCESSFUL);
 
+    err = mciSendString("seek mysound to 0xfa", NULL, 0, NULL);
+    ok(err==MCIERR_BAD_INTEGER,"mci seek to 0xfa returned %s\n", dbg_mcierr(err));
+
     err = mciSendString("status mysound position notify", buf, sizeof(buf), hwnd);
     ok(!err,"mci status position notify returned %s\n", dbg_mcierr(err));
     if(!err) ok(!strcmp(buf,"250"), "mci status position: %s\n", buf);