diff --git a/src/meminfo.cpp b/src/meminfo.cpp
index 4d2b63e36..10ae71adc 100644
--- a/src/meminfo.cpp
+++ b/src/meminfo.cpp
@@ -19,6 +19,7 @@ static size_t getMemKey(std::string key) {
     }
     return 0;
 # else
+    (void)key;
     return 0;
 # endif
 }