diff --git a/src/common.h b/src/common.h
index 9c8bdc18a..dd97a3099 100644
--- a/src/common.h
+++ b/src/common.h
@@ -44,6 +44,7 @@
 #else
 
 # include <unistd.h>
+# include <strings.h>
 # ifdef GIT_THREADS
 #	include <pthread.h>
 #	include <sched.h>