diff --git a/dialect_sqlite3.go b/dialect_sqlite3.go
index 31b19229..110b8e0a 100644
--- a/dialect_sqlite3.go
+++ b/dialect_sqlite3.go
@@ -31,17 +31,19 @@ func (sqlite3) DataTypeOf(field *StructField) string {
 		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
 			sqlType = "integer"
 			if field.IsPrimaryKey {
-				sqlType += "primary key"
+				sqlType += " primary key"
 			}
 			if _, ok := field.TagSettings["AUTO_INCREMENT"]; ok {
-				sqlType += "autoincrement"
+				sqlType += " autoincrement"
 			}
 		case reflect.Int64, reflect.Uint64:
 			sqlType = "bigint"
 			if field.IsPrimaryKey {
-				field.TagSettings["AUTO_INCREMENT"] = "AUTO_INCREMENT"
-				sqlType = "integer primary key autoincrement"
-			} else {
+				if _, ok := field.TagSettings["AUTO_INCREMENT"]; ok {
+					sqlType = "integer primary key autoincrement"
+				} else {
+					sqlType += "integer primary key"
+				}
 			}
 		case reflect.Float32, reflect.Float64:
 			sqlType = "real"