diff --git a/src/port/pg_strong_random.c b/src/port/pg_strong_random.c
index ac5c5d5df5cb9d6a0a41985dc6ee2b8a924f193e..c6ee5ea1d46ee84078b6476a6d15efc72a3918c3 100644
--- a/src/port/pg_strong_random.c
+++ b/src/port/pg_strong_random.c
@@ -28,7 +28,7 @@
 #include <openssl/rand.h>
 #endif
 #ifdef WIN32
-#include <Wincrypt.h>
+#include <wincrypt.h>
 #endif
 
 #ifdef WIN32