diff --git a/src/hardware/hw_draw.c b/src/hardware/hw_draw.c
index e6a26e605..60183b58e 100644
--- a/src/hardware/hw_draw.c
+++ b/src/hardware/hw_draw.c
@@ -657,6 +657,9 @@ void HWR_DrawFill(INT32 x, INT32 y, INT32 w, INT32 h, INT32 color)
 	FOutVector v[4];
 	FSurfaceInfo Surf;
 
+	if (w < 0 || h < 0)
+		return; // consistency w/ software
+
 //  3--2
 //  | /|
 //  |/ |