diff --git a/modules/ca/src/client/db_access.h b/modules/ca/src/client/db_access.h
index 810f82ff7..ad10a88e1 100644
--- a/modules/ca/src/client/db_access.h
+++ b/modules/ca/src/client/db_access.h
@@ -516,7 +516,7 @@ struct dbr_ctrl_double{
 };
 
 #define dbr_size_n(TYPE,COUNT)\
-((unsigned)((COUNT)<=0?dbr_size[TYPE]:dbr_size[TYPE]+((COUNT)-1)*dbr_value_size[TYPE]))
+((unsigned)((COUNT)<0?dbr_size[TYPE]:dbr_size[TYPE]+((COUNT)-1)*dbr_value_size[TYPE]))
 
 /* size for each type - array indexed by the DBR_ type code */
 LIBCA_API extern const unsigned short dbr_size[];