diff --git a/lib/checkother.cpp b/lib/checkother.cpp
index a402424b1..96d1d1719 100644
--- a/lib/checkother.cpp
+++ b/lib/checkother.cpp
@@ -3195,7 +3195,8 @@ void CheckOther::sizeofCalculation()
                         sizeofCalculationError(tok2, tok2->isExpandedMacro());
                         break;
                     }
-                }
+                } else if (tok2->type() == Token::eIncDecOp)
+                    sizeofCalculationError(tok2, tok2->isExpandedMacro());
             }
         }
     }
diff --git a/test/testother.cpp b/test/testother.cpp
index fc1b3c8fa..acd5c8a11 100644
--- a/test/testother.cpp
+++ b/test/testother.cpp
@@ -1428,6 +1428,12 @@ private:
 
         check("sizeof(void * const)");
         ASSERT_EQUALS("", errout.str());
+
+        check("sizeof(foo++)");
+        ASSERT_EQUALS("[test.cpp:1]: (warning) Found calculation inside sizeof().\n", errout.str());
+
+        check("sizeof(--foo)");
+        ASSERT_EQUALS("[test.cpp:1]: (warning) Found calculation inside sizeof().\n", errout.str());
     }
 
     void switchRedundantAssignmentTest() {