diff --git a/lib/checkmemoryleak.cpp b/lib/checkmemoryleak.cpp
index 43c0664e2..4bcbc6625 100644
--- a/lib/checkmemoryleak.cpp
+++ b/lib/checkmemoryleak.cpp
@@ -550,6 +550,11 @@ void CheckMemoryLeakInFunction::checkReallocUsage()
                     Token::findmatch(scope->bodyStart, "[{};] %varid% = *| %name% .| %name%| [;=]", tok, tok->varId()))
                     continue;
 
+                // Check if the argument is known to be null, which means it is not a memory leak
+                if (arg->hasKnownIntValue() && arg->getKnownIntValue() == 0) {
+                    continue;
+                }
+
                 const Token* tokEndRealloc = reallocTok->linkAt(1);
                 // Check that the allocation isn't followed immediately by an 'if (!var) { error(); }' that might handle failure
                 if (Token::simpleMatch(tokEndRealloc->next(), "; if (") &&
diff --git a/test/testmemleak.cpp b/test/testmemleak.cpp
index b70b35921..1b598ef84 100644
--- a/test/testmemleak.cpp
+++ b/test/testmemleak.cpp
@@ -201,7 +201,7 @@ private:
               "    free(a);\n"
               "}");
 
-        TODO_ASSERT_EQUALS("", "[test.cpp:4]: (error) Common realloc mistake: 'a' nulled but not freed upon failure\n", errout.str());
+        ASSERT_EQUALS("", errout.str());
     }
 
     void realloc4() {
@@ -296,7 +296,7 @@ private:
               "        return;\n"
               "    free(a);\n"
               "}");
-        TODO_ASSERT_EQUALS("", "[test.cpp:4]: (error) Common realloc mistake: 'a' nulled but not freed upon failure\n", errout.str());
+        ASSERT_EQUALS("", errout.str());
     }
 
     void realloc13() {