diff --git a/minui/minui.h b/minui/minui.h
index eca3a50..936f7ee 100644
--- a/minui/minui.h
+++ b/minui/minui.h
@@ -48,7 +48,7 @@
 void gr_clear();  // clear entire surface to current color
 void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a);
 void gr_fill(int x1, int y1, int x2, int y2);
-void gr_text(int x, int y, const char *s, int bold);
+void gr_text(int x, int y, const char *s, bool bold);
 void gr_texticon(int x, int y, gr_surface icon);
 int gr_measure(const char *s);
 void gr_font_size(int *x, int *y);