diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index 541bc7f0e..6e3464f7d 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -1073,8 +1073,16 @@ void Tokenizer::simplifyTypedef()
 
                     if (functionPtr || functionRef || function)
                     {
-                        tok2->insertToken("(");
-                        tok2 = tok2->next();
+                        // don't add parenthesis around function names because it
+                        // confuses other simplifications
+                        bool needParen = true;
+                        if (function && tok2->next()->str() != "*")
+                            needParen = false;
+                        if (needParen)
+                        {
+                            tok2->insertToken("(");
+                            tok2 = tok2->next();
+                        }
                         Token *tok3 = tok2;
                         if (functionNamespace)
                         {
@@ -1091,7 +1099,7 @@ void Tokenizer::simplifyTypedef()
 
                         if (!inCast)
                         {
-                            if (tok2->next()->str() != ")" && tok2->next()->str() != ",")
+                            if (tok2->next() && tok2->next()->str() != ")" && tok2->next()->str() != ",")
                             {
                                 if (Token::Match(tok2->next(), "( * %type% ) ("))
                                     tok2 = tok2->tokAt(5)->link();
@@ -1099,7 +1107,7 @@ void Tokenizer::simplifyTypedef()
                                 {
                                     if (tok2->next()->str() == "(")
                                         tok2 = tok2->next()->link();
-                                    else if (!Token::Match(tok2->next(), "[|>"))
+                                    else if (!Token::Match(tok2->next(), "[|>|;"))
                                     {
                                         tok2 = tok2->next();
 
@@ -1119,9 +1127,12 @@ void Tokenizer::simplifyTypedef()
                             }
                         }
 
-                        tok2->insertToken(")");
-                        tok2 = tok2->next();
-                        Token::createMutualLinks(tok2, tok3);
+                        if (needParen)
+                        {
+                            tok2->insertToken(")");
+                            tok2 = tok2->next();
+                            Token::createMutualLinks(tok2, tok3);
+                        }
                         tok2->insertToken("(");
                         tok2 = tok2->next();
                         tok3 = tok2;
diff --git a/test/testsimplifytokens.cpp b/test/testsimplifytokens.cpp
index 3ee4cc7fc..b4385816a 100644
--- a/test/testsimplifytokens.cpp
+++ b/test/testsimplifytokens.cpp
@@ -192,7 +192,8 @@ private:
         TEST_CASE(simplifyTypedef47);
         TEST_CASE(simplifyTypedef48); // ticket #1673
 
-        TEST_CASE(simplifyTypedefFunction);
+        TEST_CASE(simplifyTypedefFunction1);
+        TEST_CASE(simplifyTypedefFunction2); // ticket #1685
 
         TEST_CASE(reverseArraySyntax)
         TEST_CASE(simplify_numeric_condition)
@@ -3988,7 +3989,7 @@ private:
         ASSERT_EQUALS(expected, sizeof_(code));
     }
 
-    void simplifyTypedefFunction()
+    void simplifyTypedefFunction1()
     {
         {
             const char code[] = "typedef void (my_func)(arg_class*);\n"
@@ -4021,6 +4022,17 @@ private:
         }
     }
 
+    void simplifyTypedefFunction2() // ticket #1685
+    {
+        const char code[] = "typedef void voidfn (int);\n"
+                            "voidfn xxx;";
+
+        // The expected result..
+        const std::string expected("; "
+                                   "void xxx ( int ) ;");
+        ASSERT_EQUALS(expected, sizeof_(code));
+    }
+
     void reverseArraySyntax()
     {
         ASSERT_EQUALS("a [ 13 ]", tok("13[a]"));