diff --git a/core/hw/aica/sgc_if.cpp b/core/hw/aica/sgc_if.cpp
index 2709e6cd4..2abcfa806 100755
--- a/core/hw/aica/sgc_if.cpp
+++ b/core/hw/aica/sgc_if.cpp
@@ -563,7 +563,7 @@ struct ChannelEx
 	{
 		u32 oct=ccd->OCT;
 
-		update_rate = 1024 | ccd->FNS;
+		u32 update_rate = 1024 | ccd->FNS;
 		if (oct& 8)
 			update_rate>>=(16-oct);
 		else