diff --git a/source/function_patcher.cpp b/source/function_patcher.cpp
index 2443d91..6141f4c 100644
--- a/source/function_patcher.cpp
+++ b/source/function_patcher.cpp
@@ -249,6 +249,10 @@ void FunctionPatcherRestoreFunctions(function_replacement_data_t *replacements,
                 sourceAddrPhys = sourceAddr + 0x30800000 - 0x00800000;
             }
 
+            if(sourceAddrPhys == 0){
+                OSFatal("Failed to get physical address");
+            }
+
             KernelCopyData(targetAddrPhys, sourceAddrPhys, 4);
             if (DEBUG_LOG_DYN) {
                 WHBLogPrintf("");