diff --git a/P25Gateway/Speech.cpp b/P25Gateway/Speech.cpp
index 525eded..a1f22cc 100644
--- a/P25Gateway/Speech.cpp
+++ b/P25Gateway/Speech.cpp
@@ -26,6 +26,7 @@
 
 #include <cstdio>
 #include <cassert>
+#include <cstring>
 
 const unsigned int SRC_ID = 10999U;