diff --git a/lib/checkautovariables.cpp b/lib/checkautovariables.cpp
index ce3c89b31..785742515 100644
--- a/lib/checkautovariables.cpp
+++ b/lib/checkautovariables.cpp
@@ -339,7 +339,12 @@ void CheckAutoVariables::errorReturnTempReference(const Token *tok)
 
 void CheckAutoVariables::errorInvalidDeallocation(const Token *tok)
 {
-    reportError(tok, Severity::error, "autovarInvalidDeallocation", "Invalid deallocation");
+    reportError(tok,
+                Severity::error,
+                "autovarInvalidDeallocation",
+                "Deallocating auto-variable is invalid\n"
+                "Deallocating an auto-variable is invalid. You should only free memory "
+                "that has been allocated dynamically.");
 }
 
 
diff --git a/test/testautovariables.cpp b/test/testautovariables.cpp
index dfe98c52b..ca4fdfc8d 100644
--- a/test/testautovariables.cpp
+++ b/test/testautovariables.cpp
@@ -297,7 +297,7 @@ private:
               "char tmp[256];\n"
               "free (tmp);\n"
               "}\n");
-        ASSERT_EQUALS(std::string("[test.cpp:5]: (error) Invalid deallocation\n"), errout.str());
+        ASSERT_EQUALS(std::string("[test.cpp:5]: (error) Deallocating auto-variable is invalid\n"), errout.str());
 
         check("void f()\n"
               "{\n"