diff --git a/config.h.cmake.in b/config.h.cmake.in
index f2cdd39..1c0dd6f 100644
--- a/config.h.cmake.in
+++ b/config.h.cmake.in
@@ -469,8 +469,8 @@
 #define strncasecmp strnicmp
 #define strcasecmp _stricmp
 
-#define S_IRUSR 0
-#define S_IWUSR 0
+#define S_IRUSR _S_IREAD
+#define S_IWUSR _S_IWRITE
 #define R_OK 4
 #define W_OK 2
 #define X_OK 1