diff --git a/scope_private.go b/scope_private.go
index fa5d5f44..e7ea6699 100644
--- a/scope_private.go
+++ b/scope_private.go
@@ -21,7 +21,11 @@ func (scope *Scope) buildWhereCondition(clause map[string]interface{}) (str stri
 		if regexp.MustCompile("^\\s*\\d+\\s*$").MatchString(value) {
 			return scope.primaryCondition(scope.AddToVars(value))
 		} else if value != "" {
-			str = fmt.Sprintf("(%v)", value)
+			if regexp.MustCompile("^[a-zA-Z0-9]+$").MatchString(value) {
+				return scope.primaryCondition(scope.AddToVars(value))
+			} else {
+				str = fmt.Sprintf("(%v)", value)
+			}
 		}
 	case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, sql.NullInt64:
 		return scope.primaryCondition(scope.AddToVars(value))