diff --git a/src/regex/regcustom.h b/src/regex/regcustom.h
index 1c87c02a1e..328354a7d7 100644
--- a/src/regex/regcustom.h
+++ b/src/regex/regcustom.h
@@ -50,13 +50,13 @@
 #endif
 
 #if !wxUSE_UNICODE
-#	define wx_wchar char
+#   define wx_wchar char
 #else // Unicode
     #if (defined(__GNUC__) && !wxCHECK_GCC_VERSION(2, 96))
-    #		define wx_wchar __WCHAR_TYPE__ 
+    #       define wx_wchar __WCHAR_TYPE__ 
     #else // __WCHAR_TYPE__ and gcc < 2.96
         // standard case
-        #		define wx_wchar wchar_t         
+        #       define wx_wchar wchar_t         
     #endif // __WCHAR_TYPE__
 #endif // ASCII/Unicode