diff --git a/include/wx/longlong.h b/include/wx/longlong.h
index 40a9ba46f5..73103bd244 100644
--- a/include/wx/longlong.h
+++ b/include/wx/longlong.h
@@ -62,9 +62,9 @@
     #define wxLongLongSuffix i64
     #define wxLongLongFmtSpec _T("I64")
 #elif (defined(SIZEOF_LONG_LONG) && SIZEOF_LONG_LONG >= 8)  || \
-        defined(__MINGW32__) || \\
-        defined(__CYGWIN__) || \\
-        defined(__WXMICROWIN__) \\
+        defined(__MINGW32__) || \
+        defined(__CYGWIN__) || \
+        defined(__WXMICROWIN__) \
         (defined(__DJGPP__) && __DJGPP__ >= 2)
     #define wxLongLong_t long long
     #define wxLongLongSuffix ll