diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index ac5c44d57..e9c758429 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -8531,7 +8531,7 @@ void Tokenizer::simplifyEnum()
                         simplify = true;
                         hasClass = true;
                     }
-                    else if (inScope && !exitThisScope && (tok2->str() == enumType->str() || (tok2->str() == "enum" && tok2->next()->str() == enumType->str())))
+                    else if (inScope && !exitThisScope && (tok2->str() == enumType->str() || (tok2->str() == "enum" && tok2->next() && tok2->next()->str() == enumType->str())))
                     {
                         if (Token::simpleMatch(tok2->previous(), "::"))
                         {
diff --git a/test/testsimplifytokens.cpp b/test/testsimplifytokens.cpp
index 28810954c..0fff9f6c9 100644
--- a/test/testsimplifytokens.cpp
+++ b/test/testsimplifytokens.cpp
@@ -313,6 +313,7 @@ private:
         TEST_CASE(enum23); // ticket #2804
         TEST_CASE(enum24); // ticket #2828
         TEST_CASE(enum25); // ticket #2966
+        TEST_CASE(enum26); // ticket #2975 (segmentation fault)
 
         // remove "std::" on some standard functions
         TEST_CASE(removestd);
@@ -6657,6 +6658,13 @@ private:
         ASSERT_EQUALS("[test.cpp:1]: (error) syntax error\n", errout.str());
     }
 
+    void enum26() // ticket #2978 (segmentation fault)
+    {
+        const char code[] = "enum E {} e enum\n";
+        tok(code, false);
+        ASSERT_EQUALS("", errout.str());
+    }
+
     void removestd()
     {
         ASSERT_EQUALS("; strcpy ( a , b ) ;", tok("; std::strcpy(a,b);"));