diff --git a/sysdeps/linux/glibtop_private.c b/sysdeps/linux/glibtop_private.c
index 18cb7a6ecb84ed578f65564b4aeea5701d4ef283..8d170b5eec010326421fb1d62d54a39a6b661b5a 100644
--- a/sysdeps/linux/glibtop_private.c
+++ b/sysdeps/linux/glibtop_private.c
@@ -65,8 +65,13 @@ get_from_pipe (char *buffer, const size_t bufsiz, const char *cmd)
 	fp = popen (cmd, "r");
 
 	size_t psize = fread(buffer,1,bufsiz,fp);
-	if (psize == bufsiz)
+
+	if (psize == bufsiz) {
 		g_warning("Read bufsiz bytes, there may be more");
+		buffer [bufsiz - 1] = '\0';
+	} else {
+		buffer [psize] = '\0';
+	}
 
 	pclose (fp);
 }