diff --git a/lib/checkother.cpp b/lib/checkother.cpp
index 34a8bdb41..98720b879 100644
--- a/lib/checkother.cpp
+++ b/lib/checkother.cpp
@@ -1021,7 +1021,7 @@ void CheckOther::checkUnreachableCode()
             } else if (Token::Match(tok, "goto %any% ;")) {
                 secondBreak = tok->tokAt(3);
                 labelName = tok->next();
-            } else if (Token::Match(tok, "%name% (") && _settings->library.isnoreturn(tok)) {
+            } else if (Token::Match(tok, "%name% (") && _settings->library.isnoreturn(tok) && !Token::Match(tok->next()->astParent(), "?|:")) {
                 if ((!tok->function() || (tok->function()->token != tok && tok->function()->tokenDef != tok)) && tok->linkAt(1)->strAt(1) != "{")
                     secondBreak = tok->linkAt(1)->tokAt(2);
             }
diff --git a/test/testother.cpp b/test/testother.cpp
index 752ea1e58..53995bbba 100644
--- a/test/testother.cpp
+++ b/test/testother.cpp
@@ -3147,6 +3147,19 @@ private:
               "    per_state_info() : enter(0), exit(0), events(0) {}\n"
               "};", nullptr, false, false, false);
         ASSERT_EQUALS("", errout.str());
+
+        // #6664
+        check("void foo() {\n"
+              "    (beat < 100) ? (void)0 : exit(0);\n"
+              "    bar();\n"
+              "}", nullptr, false, false, false, &settings);
+        ASSERT_EQUALS("", errout.str());
+
+        check("void foo() {\n"
+              "    (beat < 100) ? exit(0) : (void)0;\n"
+              "    bar();\n"
+              "}", nullptr, false, false, false, &settings);
+        ASSERT_EQUALS("", errout.str());
     }