diff --git a/client/util.h b/client/util.h
index 83a5c87cd..dcd702fb0 100644
--- a/client/util.h
+++ b/client/util.h
@@ -174,7 +174,7 @@
 
 #ifndef DropField
 #define DropField() { \
-        UsbCommand c = {CMD_READER_ISO_14443a, {0,0,0}}; clearCommandBuffer(); SendCommand(&c); \
+        UsbCommand c_drop = {CMD_READER_ISO_14443a, {0,0,0}}; clearCommandBuffer(); SendCommand(&c_drop); \
     }
 #endif