diff --git a/include/basetsd.h b/include/basetsd.h
index f8553525f37..96ea3f01bc0 100644
--- a/include/basetsd.h
+++ b/include/basetsd.h
@@ -36,7 +36,7 @@ extern "C" {
  * 64-bit.
  */
 
-#if (defined(__x86_64__) || defined(__powerpc64__) || defined(__sparc64__) || defined(__aarch64__)) && !defined(_WIN64)
+#if (defined(__x86_64__) || defined(__powerpc64__) || defined(__aarch64__)) && !defined(_WIN64)
 #define _WIN64
 #endif
 
@@ -277,10 +277,6 @@ typedef ULONG_PTR KAFFINITY, *PKAFFINITY;
 # undef  WORDS_BIGENDIAN
 # undef  BITFIELDS_BIGENDIAN
 # define ALLOW_UNALIGNED_ACCESS
-#elif defined(__sparc__)
-# define WORDS_BIGENDIAN
-# define BITFIELDS_BIGENDIAN
-# undef  ALLOW_UNALIGNED_ACCESS
 #elif defined(__powerpc__)
 # define WORDS_BIGENDIAN
 # define BITFIELDS_BIGENDIAN
diff --git a/include/msvcrt/crtdefs.h b/include/msvcrt/crtdefs.h
index dde5ea188a5..8aed64cb598 100644
--- a/include/msvcrt/crtdefs.h
+++ b/include/msvcrt/crtdefs.h
@@ -29,7 +29,7 @@
 # error You cannot use both wine/port.h and msvcrt headers
 #endif
 
-#if (defined(__x86_64__) || defined(__powerpc64__) || defined(__sparc64__) || defined(__aarch64__)) && !defined(_WIN64)
+#if (defined(__x86_64__) || defined(__powerpc64__) || defined(__aarch64__)) && !defined(_WIN64)
 #define _WIN64
 #endif
 
diff --git a/include/windef.h b/include/windef.h
index 1e54fcb83ea..e77b1ca0e00 100644
--- a/include/windef.h
+++ b/include/windef.h
@@ -37,7 +37,7 @@ extern "C" {
 
 /* Calling conventions definitions */
 
-#if (defined(__x86_64__) || defined(__powerpc64__) || defined(__sparc64__) || defined(__aarch64__)) && !defined(_WIN64)
+#if (defined(__x86_64__) || defined(__powerpc64__) || defined(__aarch64__)) && !defined(_WIN64)
 #define _WIN64
 #endif