diff --git a/internal/proxy/task.go b/internal/proxy/task.go
index 501af2d6dd..fda1274f6c 100644
--- a/internal/proxy/task.go
+++ b/internal/proxy/task.go
@@ -1193,11 +1193,11 @@ func (cct *createCollectionTask) PreExecute(ctx context.Context) error {
 				return errors.New("dimension is not defined in field type params, check type param `dim` for vector field")
 			}
 			if field.DataType == schemapb.DataType_FloatVector {
-				if err := ValidateDimension(dim, false); err != nil {
+				if err := validateDimension(dim, false); err != nil {
 					return err
 				}
 			} else {
-				if err := ValidateDimension(dim, true); err != nil {
+				if err := validateDimension(dim, true); err != nil {
 					return err
 				}
 			}
diff --git a/internal/proxy/validate_util.go b/internal/proxy/validate_util.go
index 79f604b516..3c048950bb 100644
--- a/internal/proxy/validate_util.go
+++ b/internal/proxy/validate_util.go
@@ -140,7 +140,7 @@ func validateFieldName(fieldName string) error {
 	return nil
 }
 
-func ValidateDimension(dim int64, isBinary bool) error {
+func validateDimension(dim int64, isBinary bool) error {
 	if dim <= 0 || dim > Params.MaxDimension {
 		return fmt.Errorf("invalid dimension: %d. should be in range 1 ~ %d", dim, Params.MaxDimension)
 	}
diff --git a/internal/proxy/validate_util_test.go b/internal/proxy/validate_util_test.go
index 7dfb467a04..a69b77c117 100644
--- a/internal/proxy/validate_util_test.go
+++ b/internal/proxy/validate_util_test.go
@@ -96,15 +96,15 @@ func TestValidateFieldName(t *testing.T) {
 }
 
 func TestValidateDimension(t *testing.T) {
-	assert.Nil(t, ValidateDimension(1, false))
-	assert.Nil(t, ValidateDimension(Params.MaxDimension, false))
-	assert.Nil(t, ValidateDimension(8, true))
-	assert.Nil(t, ValidateDimension(Params.MaxDimension, true))
+	assert.Nil(t, validateDimension(1, false))
+	assert.Nil(t, validateDimension(Params.MaxDimension, false))
+	assert.Nil(t, validateDimension(8, true))
+	assert.Nil(t, validateDimension(Params.MaxDimension, true))
 
 	// invalid dim
-	assert.NotNil(t, ValidateDimension(-1, false))
-	assert.NotNil(t, ValidateDimension(Params.MaxDimension+1, false))
-	assert.NotNil(t, ValidateDimension(9, true))
+	assert.NotNil(t, validateDimension(-1, false))
+	assert.NotNil(t, validateDimension(Params.MaxDimension+1, false))
+	assert.NotNil(t, validateDimension(9, true))
 }
 
 func TestValidateVectorFieldMetricType(t *testing.T) {