diff --git a/src/video_core/texture_cache/texture_cache.cpp b/src/video_core/texture_cache/texture_cache.cpp
index 658cfa41..e42a0bbd 100644
--- a/src/video_core/texture_cache/texture_cache.cpp
+++ b/src/video_core/texture_cache/texture_cache.cpp
@@ -15,6 +15,7 @@
 
 #define PAGE_NOACCESS PROT_NONE
 #define PAGE_READWRITE (PROT_READ | PROT_WRITE)
+#define PAGE_READONLY PROT_READ
 #else
 #include <windows.h>