diff --git a/soql/parser/core/helpers.go b/soql/parser/core/helpers.go
index 156f7c9..0a55646 100644
--- a/soql/parser/core/helpers.go
+++ b/soql/parser/core/helpers.go
@@ -1,6 +1,8 @@
 package core
 
 import (
+	"strings"
+
 	. "github.com/shellyln/takenoco/base"
 	objparser "github.com/shellyln/takenoco/object"
 )
@@ -31,7 +33,7 @@ func makeOpMatcher(className string, ops []string) func(c interface{}) bool {
 		}
 		val := ast.Value.(string)
 		for _, op := range ops {
-			if op == val {
+			if strings.EqualFold(op, val) {
 				return true
 			}
 		}
diff --git a/soql/parser/parser_test.go b/soql/parser/parser_test.go
index d384e29..c02529d 100644
--- a/soql/parser/parser_test.go
+++ b/soql/parser/parser_test.go
@@ -91,6 +91,18 @@ func TestParse(t *testing.T) {
 		want:     nil,
 		wantErr:  false,
 		dbgBreak: true,
+	}, {
+		name:     "Fix bug (2025-01-08) #1",
+		args:     args{s: `SELECT Id FROM Contact WHERE LastName = 'bar' or (Name = 'bar' and LastName = 'foo')`},
+		want:     nil,
+		wantErr:  false,
+		dbgBreak: true,
+	}, {
+		name:     "Fix bug (2025-01-08) #2",
+		args:     args{s: `SELECT Id FROM Contact WHERE LastName = 'bar' OR (Name = 'bar' AND LastName = 'foo')`},
+		want:     nil,
+		wantErr:  false,
+		dbgBreak: true,
 	}}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {