diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index ac977c288..4c5d5e566 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -7765,6 +7765,7 @@ bool Tokenizer::simplifyCalculations()
                     tok->str(result);
                     tok->deleteNext();
                     tok->deleteNext();
+                    ret = true;
                 }
             }
 
diff --git a/test/testpreprocessor.cpp b/test/testpreprocessor.cpp
index 790d0d97b..72af1a9fc 100644
--- a/test/testpreprocessor.cpp
+++ b/test/testpreprocessor.cpp
@@ -1050,7 +1050,8 @@ private:
             ASSERT_EQUALS(true, Preprocessor::match_cfg_def(cfg, "A<2"));
             ASSERT_EQUALS(false, Preprocessor::match_cfg_def(cfg, "A==2"));
             ASSERT_EQUALS(false, Preprocessor::match_cfg_def(cfg, "A<1"));
-            TODO_ASSERT_EQUALS(true, false, Preprocessor::match_cfg_def(cfg, "A>=1&&B<=A"));
+            ASSERT_EQUALS(false, Preprocessor::match_cfg_def(cfg, "A>=1&&B<=A"));
+            ASSERT_EQUALS(true, Preprocessor::match_cfg_def(cfg, "A==1 && A==1"));
         }
     }