diff --git a/polymer/eduke32/build/src/winlayer.c b/polymer/eduke32/build/src/winlayer.c
index 29d6b9259..1fefbe02b 100644
--- a/polymer/eduke32/build/src/winlayer.c
+++ b/polymer/eduke32/build/src/winlayer.c
@@ -2273,7 +2273,7 @@ int32_t setgamma(void)
 
     // This formula is taken from Doomsday
 
-    if (!winlayer_uselastgamma)
+    if (winlayer_uselastgamma <= 0)
         for (i = 0; i < 256; i++)
         {
             double val = i * contrast - (contrast - 1) * 127;