diff --git a/src/shared/defs.h b/src/shared/defs.h
index d77b344e..f77f6d0c 100644
--- a/src/shared/defs.h
+++ b/src/shared/defs.h
@@ -325,3 +325,10 @@ Util_IsSingleplayer(void)
 	/* else we're multiplayer */
 	return false;
 }
+
+float
+crandom(void)
+{
+	return ((random() - 0.5f) * 2.0f);
+}
+