diff --git a/dlls/msi/action.c b/dlls/msi/action.c
index 02beb0cfb4d..ee9a13baaa0 100644
--- a/dlls/msi/action.c
+++ b/dlls/msi/action.c
@@ -2003,7 +2003,7 @@ static LPWSTR msi_get_disk_file_version( LPCWSTR filename )
 {
     static const WCHAR name_fmt[] =
         {'%','u','.','%','u','.','%','u','.','%','u',0};
-    static WCHAR name[] = {'\\',0};
+    static const WCHAR name[] = {'\\',0};
     VS_FIXEDFILEINFO *lpVer;
     WCHAR filever[0x100];
     LPVOID version;
diff --git a/dlls/msi/automation.c b/dlls/msi/automation.c
index 7f59b4ec844..e919b0d240c 100644
--- a/dlls/msi/automation.c
+++ b/dlls/msi/automation.c
@@ -405,7 +405,7 @@ static HRESULT WINAPI AutomationObject_Invoke(
              (hr == DISP_E_PARAMNOTFOUND ||
               hr == DISP_E_EXCEPTION)) {
         static const WCHAR szComma[] = { ',',0 };
-        static WCHAR szExceptionSource[] = {'M','s','i',' ','A','P','I',' ','E','r','r','o','r',0};
+        static const WCHAR szExceptionSource[] = {'M','s','i',' ','A','P','I',' ','E','r','r','o','r',0};
         WCHAR szExceptionDescription[MAX_PATH];
         BSTR bstrParamNames[MAX_FUNC_PARAMS];
         unsigned namesNo, i;
diff --git a/dlls/msi/database.c b/dlls/msi/database.c
index 875d2d0b681..eaf8ebdec07 100644
--- a/dlls/msi/database.c
+++ b/dlls/msi/database.c
@@ -83,7 +83,7 @@ UINT MSI_OpenDatabaseW(LPCWSTR szDBPath, LPCWSTR szPersist, MSIDATABASE **pdb)
     WCHAR path[MAX_PATH];
 
     static const WCHAR backslash[] = {'\\',0};
-    static WCHAR szTables[]  = { '_','T','a','b','l','e','s',0 };
+    static const WCHAR szTables[]  = { '_','T','a','b','l','e','s',0 };
 
     TRACE("%s %s\n",debugstr_w(szDBPath),debugstr_w(szPersist) );