diff --git a/src/tz.cpp b/src/tz.cpp
index 0006f42..9d55d4f 100644
--- a/src/tz.cpp
+++ b/src/tz.cpp
@@ -415,9 +415,9 @@ access_install()
 }
 
 void
-set_install(const std::string& s)
+set_install(const std::string& install)
 {
-    access_install() = s;
+    access_install() = install;
 }
 
 static