diff --git a/base/install_base.iss b/base/install_base.iss
index e7bb68e..074606e 100644
--- a/base/install_base.iss
+++ b/base/install_base.iss
@@ -203,7 +203,7 @@ Root: HKLM; Subkey: "SYSTEM\CurrentControlSet\Control\Session Manager\Environmen
       ValueName: "X_COMMAND_MYSQL"; ValueData: "{app}\mysql\"; Flags: uninsdeletevalue ;
 ; 追加到 PATH 变量
 Root: HKLM; Subkey: "SYSTEM\CurrentControlSet\Control\Session Manager\Environment"; ValueType: expandsz; AfterInstall: RefreshEnvironment; Components: MySQL; \
-      ValueName: "Path"; ValueData: "{olddata};%X_COMMAND_MYSQL%\bin"; Check: NeedsAddPath('%X_COMMAND_MYSQL%\bin'); Flags: uninsdeletevalue ;
+      ValueName: "Path"; ValueData: "{olddata};%X_COMMAND_MYSQL%\bin"; Check: NeedsAddPath('%X_COMMAND_MYSQL%\bin'); Flags: preservestringtype ;