diff --git a/Source/engine.cpp b/Source/engine.cpp
index 9a4c4de8a..a7173b2f3 100644
--- a/Source/engine.cpp
+++ b/Source/engine.cpp
@@ -2337,9 +2337,9 @@ int random(BYTE idx, int v)
 {
 	if (v <= 0)
 		return 0;
-	if (v >= 0xFFFF)
-		return GetRndSeed() % v;
-	return (GetRndSeed() >> 16) % v;
+	if (v < 0xFFFF)
+		return (GetRndSeed() >> 16) % v;
+	return GetRndSeed() % v;
 }
 
 void engine_debug_trap(BOOL show_cursor)