diff --git a/src/helpers.c b/src/helpers.c
index f6a58cb..4a16040 100644
--- a/src/helpers.c
+++ b/src/helpers.c
@@ -3,6 +3,7 @@ struct ENGINE_TEXTURE * engine_rendertarget_get() {
 }
 
 void engine_rendertarget_fill(int sx,int sy,int ex,int ey) {
+	ex += 1; ey += 1;
 	int y = sy;
 	while (y < ey) {
 		int x = sx;