diff --git a/README.md b/README.md
index 33e979d..8907c90 100644
--- a/README.md
+++ b/README.md
@@ -162,7 +162,7 @@ char *pr_rgbled(char *arglist, char *res, int *reslen) {
   return res; /* return the result pointer */
 }
 ```
-Then you can register this primitive with `nnt_regprimitive("rgb", &pr_rgbled);` in your main C code, and then, calling `#(rgb,43,67,133)` in your script will return the string `R=43, G=67, B=133` if the API succeeds.
+Then you can register this primitive with `nnt_regprimitive("rgb", &pr_rgbled);` in your main C code, and then, calling `##(rgb,43,67,133)` in your script will return the string `R=43, G=67, B=133` if the API succeeds.
 
 ## FAQ