diff --git a/Source/USharp/Private/USharpLatentAction.cpp b/Source/USharp/Private/USharpLatentAction.cpp
new file mode 100644
index 0000000..3a07780
--- /dev/null
+++ b/Source/USharp/Private/USharpLatentAction.cpp
@@ -0,0 +1,6 @@
+#include "USharpLatentAction.h"
+
+ManagedLatentCallbackDel UUSharpAsyncActionBaseCallback = nullptr;
+ManagedLatentCallbackDel UUSharpOnlineBlueprintCallProxyBaseCallback = nullptr;
+ManagedLatentCallbackDel UUSharpGameplayTaskCallback = nullptr;
+
diff --git a/Source/USharp/Private/USharpLatentAction.h b/Source/USharp/Private/USharpLatentAction.h
index ede15e2..a2c7ecd 100644
--- a/Source/USharp/Private/USharpLatentAction.h
+++ b/Source/USharp/Private/USharpLatentAction.h
@@ -38,9 +38,9 @@ enum class ManagedLatentCallbackType : int32
 };
 
 typedef void(CSCONV *ManagedLatentCallbackDel)(ManagedLatentCallbackType CallbackType, const void* ThisPtr, const void* Data);
-ManagedLatentCallbackDel UUSharpAsyncActionBaseCallback = nullptr;
-ManagedLatentCallbackDel UUSharpOnlineBlueprintCallProxyBaseCallback = nullptr;
-ManagedLatentCallbackDel UUSharpGameplayTaskCallback = nullptr;
+extern ManagedLatentCallbackDel UUSharpAsyncActionBaseCallback;
+extern ManagedLatentCallbackDel UUSharpOnlineBlueprintCallProxyBaseCallback;
+extern ManagedLatentCallbackDel UUSharpGameplayTaskCallback;
 
 class FUSharpLatentAction : public FPendingLatentAction
 {