diff --git a/src/core/preprocessor.js b/src/core/preprocessor.js
index 02c5a68c5c4..1280b6b5322 100644
--- a/src/core/preprocessor.js
+++ b/src/core/preprocessor.js
@@ -219,8 +219,8 @@ class Preprocessor {
         }
 
         if (error) {
-            Debug.error("Failed to preprocess shader: ", { source: originalSource });
-            return null;
+            console.warn("Failed to preprocess shader: ", { source: originalSource });
+            return originalSource;
         }
 
         return source;