diff --git a/include/mov.h b/include/mov.h
index 8b4675ec5..ef87dd168 100755
--- a/include/mov.h
+++ b/include/mov.h
@@ -46,6 +46,7 @@
 #define MOV_DCODNUM    "DCODNUM"
 #define MOV_DNDOC      "DNDOC"
 #define MOV_DATAINC    "DATAINC"
+#define MOV_LIQDIFF    "LIQDIFF"
 
 #define NUMREG_PROVVISORIO 999999L