diff --git a/dlls/msi/tests/install.c b/dlls/msi/tests/install.c
index e96f7dce56b..778d05ac099 100644
--- a/dlls/msi/tests/install.c
+++ b/dlls/msi/tests/install.c
@@ -1733,7 +1733,7 @@ static BOOL pf_exists(LPCSTR file)
 static void delete_pfmsitest_files(void)
 {
     SHFILEOPSTRUCT shfl;
-    CHAR path[MAX_PATH+10];
+    CHAR path[MAX_PATH+11];
 
     lstrcpyA(path, PROG_FILES_DIR);
     lstrcatA(path, "\\msitest\\*");