diff --git a/cpacfstats/stats_sock.c b/cpacfstats/stats_sock.c
index 2c1823ca..a8b0b702 100644
--- a/cpacfstats/stats_sock.c
+++ b/cpacfstats/stats_sock.c
@@ -16,6 +16,7 @@
 #include <poll.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <string.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/types.h>
diff --git a/include/lib/util_sys.h b/include/lib/util_sys.h
index cf6f862a..ef820f10 100644
--- a/include/lib/util_sys.h
+++ b/include/lib/util_sys.h
@@ -13,6 +13,7 @@
 #define LIB_UTIL_SYS_H
 
 #include <stdbool.h>
+#include <sys/types.h>
 
 int util_sys_get_dev_addr(const char *dev, char *addr);
 bool util_sys_dev_is_partition(dev_t dev);
diff --git a/mon_tools/mon_procd.c b/mon_tools/mon_procd.c
index c4f46d87..d0da1bb4 100644
--- a/mon_tools/mon_procd.c
+++ b/mon_tools/mon_procd.c
@@ -25,7 +25,7 @@
 #include <sys/statvfs.h>
 #include <sys/vfs.h>
 #include <syslog.h>
-#include <time.h>
+#include <sys/time.h>
 #include <unistd.h>
 #include <utmp.h>
 
diff --git a/ziomon/ziomon_msg_tools.h b/ziomon/ziomon_msg_tools.h
index 2b165735..616dc02a 100644
--- a/ziomon/ziomon_msg_tools.h
+++ b/ziomon/ziomon_msg_tools.h
@@ -12,6 +12,8 @@
 #ifndef ZIOMON_MSG__TOOLS_H
 #define ZIOMON_MSG__TOOLS_H
 
+#include <time.h>
+
 #include "ziomon_dacc.h"
 
 void conv_blkiomon_v2_to_v3(struct message *msg);
diff --git a/zkey/keystore.c b/zkey/keystore.c
index d40c2106..81c01fcc 100644
--- a/zkey/keystore.c
+++ b/zkey/keystore.c
@@ -13,6 +13,7 @@
 #include <dirent.h>
 #include <err.h>
 #include <errno.h>
+#include <fcntl.h>
 #include <fnmatch.h>
 #include <regex.h>
 #include <stdlib.h>