diff --git a/addons/misra.py b/addons/misra.py
index d00a8f56d..28a74d9a8 100755
--- a/addons/misra.py
+++ b/addons/misra.py
@@ -1001,7 +1001,7 @@ def misra_11_8(data):
                     continue
                 if argtok.valueType.pointer == 0:
                     continue
-                const1 = argvar.isConst
+                const1 = argvar.constness
                 const2 = arguments[argnr - 1].valueType.constness
                 if (const1 % 2) < (const2 % 2):
                     reportError(token, 11, 8)
diff --git a/addons/test/misra-test.c b/addons/test/misra-test.c
index 1d143972c..96fbcd794 100644
--- a/addons/test/misra-test.c
+++ b/addons/test/misra-test.c
@@ -211,6 +211,7 @@ void misra_11_7(int *p, float f) {
 }
 
 char * misra_11_8(const char *str) {
+  misra_11_8(str); // no-warning
   return (char *)str; // 11.8
 }