diff --git a/aegisub/main.cpp b/aegisub/main.cpp
index e994decc4..93ec26cd7 100644
--- a/aegisub/main.cpp
+++ b/aegisub/main.cpp
@@ -105,7 +105,7 @@ void SetThreadName(DWORD dwThreadID, LPCSTR szThreadName) {
 	info.dwThreadID = dwThreadID;
 	info.dwFlags = 0;
 	__try {
-		RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(DWORD), (DWORD *)&info);
+		RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(DWORD), (ULONG_PTR *)&info);
 	}
 	__except (EXCEPTION_CONTINUE_EXECUTION) {}
 }