diff --git a/addons/misra-test.c b/addons/misra-test.c
index 57025b8c4..168ec4d85 100644
--- a/addons/misra-test.c
+++ b/addons/misra-test.c
@@ -10,6 +10,11 @@
 
 typedef unsigned char u8;
 
+void misra_4_3() {
+  dostuff();
+  asm("abc"); // 4.3
+}
+
 void misra_5_1() {
   int a123456789012345678901234567890; // no-warning
   int a1234567890123456789012345678901; // 5.1
diff --git a/addons/misra.py b/addons/misra.py
index b93f70361..191ca61e8 100644
--- a/addons/misra.py
+++ b/addons/misra.py
@@ -235,6 +235,13 @@ def findInclude(rawTokens, header):
             return headerToken
     return None
 
+def misra_4_3(data):
+    for token in data.tokenlist:
+        if not simpleMatch(token, 'asm ('):
+            continue
+        if token.scope.type != 'Function' or (not token.previous) or token.previous.str != '{' or (not simpleMatch(token.next.link, ') ; }')):
+            reportError(token, 4, 3)
+
 def misra_5_1(data):
     for token in data.tokenlist:
         if token.isName and len(token.str) > 31:
@@ -716,6 +723,7 @@ for arg in sys.argv[1:]:
         if len(data.configurations) > 1:
             print('Checking ' + arg + ', config "' + cfg.name + '"...')
 
+        misra_4_3(cfg)
         misra_5_1(cfg)
         if cfgNumber == 1:
             misra_7_1(data.rawTokens)