diff --git a/src/win32_window.c b/src/win32_window.c
index b610d146..882d56ce 100644
--- a/src/win32_window.c
+++ b/src/win32_window.c
@@ -804,7 +804,7 @@ static void getFullWindowSize(_GLFWwindow* window,
 //
 static ATOM registerWindowClass(void)
 {
-    WNDCLASS wc;
+    WNDCLASSW wc;
     ATOM classAtom;
 
     // Set window class parameters