diff --git a/utils/wasmbin/README.md b/utils/wasmbin/README.md
index 6b0d229384..1d1fcd4f69 100644
--- a/utils/wasmbin/README.md
+++ b/utils/wasmbin/README.md
@@ -6,6 +6,8 @@ wasmtool is an utility that allows to modify wasm binary linking information. wa
 
 ### command
 
+Only one command should be specified per call
+
 #### exportrename
 
     --exportrename inputfile