diff --git a/src/tokenize.cpp b/src/tokenize.cpp
index 7ba1652cd..17174e2e9 100644
--- a/src/tokenize.cpp
+++ b/src/tokenize.cpp
@@ -2434,24 +2434,37 @@ bool Tokenizer::simplifyIfNot()
     bool ret = false;
     for (Token *tok = _tokens; tok; tok = tok->next())
     {
-
-        if (Token::simpleMatch(tok, "0 == (") ||
-            Token::Match(tok, "0 == %var%"))
+        if (tok->str() == "(" || tok->str() == "||" || tok->str() == "&&")
         {
-            tok->deleteNext();
-            tok->str("!");
-            ret = true;
+            tok = tok->next();
+            if (Token::simpleMatch(tok, "0 == (") ||
+                Token::Match(tok, "0 == %var%"))
+            {
+                tok->deleteNext();
+                tok->str("!");
+                ret = true;
+            }
+
+            else if (Token::Match(tok, "%var% == 0"))
+            {
+                tok->deleteNext();
+                tok->next()->str(tok->str());
+                tok->str("!");
+                ret = true;
+            }
+
+            else if (Token::Match(tok, "%var% . %var% == 0"))
+            {
+                tok = tok->previous();
+                tok->insertToken("!");
+                tok = tok->tokAt(4);
+                tok->deleteNext();
+                tok->deleteNext();
+                ret = true;
+            }
         }
 
-        if (Token::Match(tok, "%var% == 0"))
-        {
-            tok->deleteNext();
-            tok->next()->str(tok->str());
-            tok->str("!");
-            ret = true;
-        }
-
-        if (tok->link() && Token::simpleMatch(tok, ") == 0"))
+        else if (tok->link() && Token::simpleMatch(tok, ") == 0"))
         {
             tok->deleteNext();
             tok->deleteNext();
diff --git a/test/testsimplifytokens.cpp b/test/testsimplifytokens.cpp
index aaa7015df..f836a2aa1 100644
--- a/test/testsimplifytokens.cpp
+++ b/test/testsimplifytokens.cpp
@@ -971,11 +971,13 @@ private:
     void ifnot()
     {
         ASSERT_EQUALS("if ( ! x )", simplifyIfNot("if(0==x)"));
+        ASSERT_EQUALS("if ( ! x )", simplifyIfNot("if(x==0)"));
         ASSERT_EQUALS("if ( ! ( a = b ) )", simplifyIfNot("if(0==(a=b))"));
         ASSERT_EQUALS("if ( ! x )", simplifyIfNot("if(x==0)"));
         ASSERT_EQUALS("if ( ! a && b ( ) )", simplifyIfNot("if( 0 == a && b() )"));
         ASSERT_EQUALS("if ( b ( ) && ! a )", simplifyIfNot("if( b() && 0 == a )"));
         ASSERT_EQUALS("if ( ! ( a = b ) )", simplifyIfNot("if((a=b)==0)"));
+        ASSERT_EQUALS("if ( ! x . y )", simplifyIfNot("if(x.y==0)"));
     }