diff --git a/lib/checkmemoryleak.cpp b/lib/checkmemoryleak.cpp
index 619f23300..4eba45ab2 100644
--- a/lib/checkmemoryleak.cpp
+++ b/lib/checkmemoryleak.cpp
@@ -385,7 +385,7 @@ void CheckMemoryLeak::deallocuseError(const Token *tok, const std::string &varna
 
 void CheckMemoryLeak::mismatchSizeError(const Token *tok, const std::string &sz) const
 {
-    reportErr(tok, Severity::error, "mismatchSize", "The given size " + sz + " is mismatching");
+    reportErr(tok, Severity::error, "mismatchSize", "The allocated size " + sz + " is not a multiple of the underlying type's size.");
 }
 
 void CheckMemoryLeak::mismatchAllocDealloc(const std::list<const Token *> &callstack, const std::string &varname) const
diff --git a/test/testmemleak.cpp b/test/testmemleak.cpp
index 541ce038c..21802140c 100644
--- a/test/testmemleak.cpp
+++ b/test/testmemleak.cpp
@@ -3490,13 +3490,14 @@ private:
               "    int *p = malloc(3);\n"
               "    free(p);\n"
               "}\n");
-        ASSERT_EQUALS("[test.cpp:3]: (error) The given size 3 is mismatching\n", errout.str());
+        ASSERT_EQUALS("[test.cpp:3]: (error) The allocated size 3 is not a multiple of the underlying type's size.\n", errout.str());
+
         check("void foo()\n"
               "{\n"
               "    int *p = g_malloc(3);\n"
               "    g_free(p);\n"
               "}\n");
-        TODO_ASSERT_EQUALS("[test.cpp:3]: (error) The given size 3 is mismatching\n", "", errout.str());
+        TODO_ASSERT_EQUALS("[test.cpp:3]: (error) The allocated size 3 is not a multiple of the underlying type's size.\n", "", errout.str());
     }