diff --git a/include/SDL_config_os2.h b/include/SDL_config_os2.h
index 63d2880603..1922217d0f 100644
--- a/include/SDL_config_os2.h
+++ b/include/SDL_config_os2.h
@@ -103,6 +103,8 @@
 #define HAVE_WCSLCPY 1
 #define HAVE_WCSLCAT 1
 #define HAVE_WCSCMP 1
+#define HAVE__WCSICMP 1
+#define HAVE__WCSNICMP 1
 #define HAVE_STRLEN 1
 #define HAVE_STRLCPY 1
 #define HAVE_STRLCAT 1