diff --git a/reactos/include/psdk/wincrypt.h b/reactos/include/psdk/wincrypt.h
index e66b3770da4..0d4f0678cd5 100644
--- a/reactos/include/psdk/wincrypt.h
+++ b/reactos/include/psdk/wincrypt.h
@@ -21,6 +21,8 @@
 #ifndef __WINE_WINCRYPT_H
 #define __WINE_WINCRYPT_H
 
+#include <specstrings.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif