diff --git a/core/imgread/common.cpp b/core/imgread/common.cpp
index 09910c2c3..dc607b91c 100644
--- a/core/imgread/common.cpp
+++ b/core/imgread/common.cpp
@@ -155,7 +155,13 @@ bool InitDrive_(char* fn)
 
 bool InitDrive()
 {
-	return DiscSwap();
+	bool rc = DiscSwap();
+	// not needed at startup and confuses some games
+	sns_asc = 0;
+	sns_ascq = 0;
+	sns_key = 0;
+
+	return rc;
 }
 
 void DiscOpenLid()
diff --git a/core/nullDC.cpp b/core/nullDC.cpp
index eef52d1d2..52d357804 100755
--- a/core/nullDC.cpp
+++ b/core/nullDC.cpp
@@ -606,7 +606,7 @@ void dc_start_game(const char *path)
 		}
 		else
 		{
-			if (DiscSwap())
+			if (InitDrive())
 				LoadCustom();
 			else
 			{