diff --git a/uisimulator/common/stubs.c b/uisimulator/common/stubs.c
index af715c6368..89e3cea102 100644
--- a/uisimulator/common/stubs.c
+++ b/uisimulator/common/stubs.c
@@ -180,10 +180,18 @@ void mpeg_set_pitch(int pitch)
 void lcd_clearrect (int x, int y, int nx, int ny)
 {
   /* Reprint char if you want to change anything */
+  (void)x;
+  (void)y;
+  (void)nx;
+  (void)ny;
 }
 
 void lcd_fillrect (int x, int y, int nx, int ny)
 {
   /* Reprint char if you want to change display anything */
+  (void)x;
+  (void)y;
+  (void)nx;
+  (void)ny;
 }
 #endif