diff --git a/dlls/gdi32/tests/font.c b/dlls/gdi32/tests/font.c
index d58b8bebee1..6950503d1f4 100644
--- a/dlls/gdi32/tests/font.c
+++ b/dlls/gdi32/tests/font.c
@@ -2912,7 +2912,7 @@ static void test_GetGlyphOutline(void)
 }
 
 /* bug #9995: there is a limit to the character width that can be specified */
-void test_GetTextMetrics2(  const char *fontname)
+static void test_GetTextMetrics2(  const char *fontname)
 {
     HFONT of, hf;
     HDC hdc;