diff --git a/addons/misra.py b/addons/misra.py
index c611f0d09..05d6dc760 100755
--- a/addons/misra.py
+++ b/addons/misra.py
@@ -214,7 +214,11 @@ def hasSideEffectsRecursive(expr):
 
 
 def isBoolExpression(expr):
-    return expr and expr.str in ['!', '==', '!=', '<', '<=', '>', '>=', '&&', '||', '0', '1']
+    if not expr:
+        return False
+    if expr.valueType and expr.valueType.type == 'bool':
+        return True
+    return expr.str in ['!', '==', '!=', '<', '<=', '>', '>=', '&&', '||', '0', '1']
 
 
 def isConstantExpression(expr):
diff --git a/addons/test/misra-test.c b/addons/test/misra-test.c
index eef249910..e1da4def9 100644
--- a/addons/test/misra-test.c
+++ b/addons/test/misra-test.c
@@ -153,9 +153,12 @@ void misra_14_2() {
   // TODO check more variants
 }
 
-void misra_14_4() {
+void misra_14_4(bool b) {
   if (x+4){} // 14.4
   else {}
+
+  if (b) {}
+  else {}
 }
 
 void misra_15_1() {