diff --git a/src/runtime_functions.js b/src/runtime_functions.js
index d638a41f55835..077bb5a5da487 100644
--- a/src/runtime_functions.js
+++ b/src/runtime_functions.js
@@ -30,6 +30,9 @@ function convertJsFunctionToWasm(func, sig) {
     }
     return new WebAssembly.Function(type, func);
   }
+  if (sig.length > 123) {
+    throw new Error(`Too many arguments! Can handle at most 122 but was given ${sig.length - 1}.`);
+  }
 
   // The module is static, with the exception of the type section, which is
   // generated based on the signature passed in.