diff --git a/src/core/Shader.js b/src/core/Shader.js
index 78b17e6..8115ccd 100644
--- a/src/core/Shader.js
+++ b/src/core/Shader.js
@@ -14,7 +14,7 @@
             return copy;
         }
     }
-    else if (src.substring(0, 9) !== 'precision')
+    else if (src.trim().substring(0, 9) !== 'precision')
     {
         return `precision ${def} float;\n${src}`;
     }