diff --git a/indra/llcommon/llapp.h b/indra/llcommon/llapp.h
index a536a06ea5ef1fc50b44e82d30634972be18dc8c..afa06df23e1e680b394d7b83b84c94cf52ddea8b 100644
--- a/indra/llcommon/llapp.h
+++ b/indra/llcommon/llapp.h
@@ -38,7 +38,7 @@ typedef LLAtomic32<U32> LLAtomicU32;
 class LLErrorThread;
 class LLLiveFile;
 #if LL_LINUX
-typedef struct siginfo siginfo_t;
+#include <signal.h>
 #endif
 
 typedef void (*LLAppErrorHandler)();