diff --git a/src/gsm.c b/src/gsm.c
index 245d187..2da91f4 100644
--- a/src/gsm.c
+++ b/src/gsm.c
@@ -15,6 +15,7 @@
 
 
 
+#include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <termios.h>