diff --git a/src/util/gui/font.h b/src/util/gui/font.h
index 0abe0cabb..626cfed38 100644
--- a/src/util/gui/font.h
+++ b/src/util/gui/font.h
@@ -33,6 +33,7 @@ unsigned GUIFontHeight(const struct GUIFont*);
 unsigned GUIFontGlyphWidth(const struct GUIFont*, uint32_t glyph);
 unsigned GUIFontSpanWidth(const struct GUIFont*, const char* text);
 
+ATTRIBUTE_FORMAT(printf, 6, 7)
 void GUIFontPrintf(const struct GUIFont*, int x, int y, enum GUITextAlignment, uint32_t color, const char* text, ...);
 void GUIFontPrint(const struct GUIFont*, int x, int y, enum GUITextAlignment, uint32_t color, const char* text);
 void GUIFontDrawGlyph(const struct GUIFont*, int x, int y, uint32_t color, uint32_t glyph);