diff --git a/src/coreclr/nativeaot/Runtime/unix/PalRedhawkUnix.cpp b/src/coreclr/nativeaot/Runtime/unix/PalRedhawkUnix.cpp
index 42b1c29db41f54..24172b9c3707e5 100644
--- a/src/coreclr/nativeaot/Runtime/unix/PalRedhawkUnix.cpp
+++ b/src/coreclr/nativeaot/Runtime/unix/PalRedhawkUnix.cpp
@@ -834,8 +834,10 @@ REDHAWK_PALEXPORT _Ret_maybenull_ _Post_writable_byte_size_(size) void* REDHAWK_
         flags |= MAP_JIT;
     }
 #endif
-
-    return mmap(NULL, size, unixProtect, flags, -1, 0);
+    void* pMappedMemory = mmap(NULL, size, unixProtect, flags, -1, 0);
+    if (pMappedMemory == MAP_FAILED)
+        return NULL;
+    return pMappedMemory;
 }
 
 REDHAWK_PALEXPORT void REDHAWK_PALAPI PalVirtualFree(_In_ void* pAddress, size_t size)