diff --git a/demos/gears.c b/demos/gears.c
index 2045b3cd..bee91da6 100644
--- a/demos/gears.c
+++ b/demos/gears.c
@@ -878,7 +878,11 @@ static int cxg_main(void)
 }
 
 #ifdef _WIN32
-int wmain(void)
+int WINAPI WinMain(
+    HINSTANCE hInstance,
+    HINSTANCE hPrevInstance,
+    LPSTR lpCmdLine,
+    int nCmdShow)
 #else
 int main(void)
 #endif
diff --git a/demos/triangle.c b/demos/triangle.c
index bac1cdc5..cc8af2e6 100644
--- a/demos/triangle.c
+++ b/demos/triangle.c
@@ -393,7 +393,11 @@ static int cxt_main(void)
 }
 
 #ifdef _WIN32
-int wmain(void)
+int WINAPI WinMain(
+    HINSTANCE hInstance,
+    HINSTANCE hPrevInstance,
+    LPSTR lpCmdLine,
+    int nCmdShow)
 #else
 int main(void)
 #endif