1 files changed, 4 insertions, 0 deletions
diff --git a/src/test_devsym.c b/src/test_devsym.c
index 836a45091..9617e63af 100644
--- a/src/test_devsym.c
+++ b/src/test_devsym.c
@@ -346,9 +346,13 @@ void devsym_register(int iDeviceChar, int iSectorSize){
   }
   if( iDeviceChar>=0 ){
     g.iDeviceChar = iDeviceChar;
+  }else{
+    g.iDeviceChar = 0;
   }
   if( iSectorSize>=0 ){
     g.iSectorSize = iSectorSize;
+  }else{
+    g.iSectorSize = 512;
   }
 }