diff --git a/Sources/Plasma/PubUtilLib/plFile/plSecureStream.cpp b/Sources/Plasma/PubUtilLib/plFile/plSecureStream.cpp
index 0d950285..e4f4e3ec 100644
--- a/Sources/Plasma/PubUtilLib/plFile/plSecureStream.cpp
+++ b/Sources/Plasma/PubUtilLib/plFile/plSecureStream.cpp
@@ -276,7 +276,7 @@ UInt32 plSecureStream::IRead(UInt32 bytes, void* buffer)
         return 0;
     UInt32 numItems;
 #if HS_BUILD_FOR_WIN32
-    bool success = (ReadFile(fRef, buffer, bytes, &numItems, NULL) != 0);
+    bool success = (ReadFile(fRef, buffer, bytes, (LPDWORD)&numItems, NULL) != 0);
 #elif HS_BUILD_FOR_UNIX
     numItems = fread(buffer, bytes, 1, fRef);
     bool success = numItems != 0;