diff --git a/Source/Editor/Cooker/Platform/Mac/MacPlatformTools.cpp b/Source/Editor/Cooker/Platform/Mac/MacPlatformTools.cpp
index 8c29bbcdd..dd05e0bec 100644
--- a/Source/Editor/Cooker/Platform/Mac/MacPlatformTools.cpp
+++ b/Source/Editor/Cooker/Platform/Mac/MacPlatformTools.cpp
@@ -242,7 +242,7 @@ bool MacPlatformTools::OnPostProcess(CookingData& data)
     const int32 result = Platform::RunProcess(dmgCommand, data.OriginalOutputPath);
     if (result != 0)
     {
-        data.Error(TEXT("Failed to package app (result code: {0}). See log for more info."), result);
+        data.Error(String::Format(TEXT("Failed to package app (result code: {0}). See log for more info."), result));
         return true;
     }
     // TODO: sign dmg
diff --git a/Source/Editor/Cooker/Platform/iOS/iOSPlatformTools.cpp b/Source/Editor/Cooker/Platform/iOS/iOSPlatformTools.cpp
index 9f2087cac..a06f4d9c9 100644
--- a/Source/Editor/Cooker/Platform/iOS/iOSPlatformTools.cpp
+++ b/Source/Editor/Cooker/Platform/iOS/iOSPlatformTools.cpp
@@ -258,7 +258,7 @@ bool iOSPlatformTools::OnPostProcess(CookingData& data)
     const int32 result = Platform::RunProcess(ipaCommand, data.OriginalOutputPath);
     if (result != 0)
     {
-        data.Error(TEXT("Failed to package app (result code: {0}). See log for more info."), result);
+        data.Error(String::Format(TEXT("Failed to package app (result code: {0}). See log for more info."), result));
         return true;
     }
     LOG(Info, "Output application package: {0} (size: {1} MB)", ipaPath, FileSystem::GetFileSize(ipaPath) / 1024 / 1024);