diff --git a/src/dmail/dmail.c b/src/dmail/dmail.c
index f78b957..b569c16 100644
--- a/src/dmail/dmail.c
+++ b/src/dmail/dmail.c
@@ -35,6 +35,7 @@ extern int errno;		/* just in case */
 #include <sys/stat.h>
 #include "c-client.h"
 #include "dquota.h"
+#include <ctype.h>
 
 
 /* Globals */
diff --git a/src/mlock/mlock.c b/src/mlock/mlock.c
index 1dca40e..95f3729 100644
--- a/src/mlock/mlock.c
+++ b/src/mlock/mlock.c
@@ -40,6 +40,8 @@
 #include <netdb.h>
 #include <ctype.h>
 #include <string.h>
+#include <unistd.h>   /* write, read, close, link, unlink, chdir, sleep, getpid, gethostname */
+#include <time.h>     /* time */
 
 #define LOCKTIMEOUT 5		/* lock timeout in minutes */
 #define LOCKPROTECTION 0664
diff --git a/src/tmail/tmail.c b/src/tmail/tmail.c
index ed5fc58..95ecbd2 100644
--- a/src/tmail/tmail.c
+++ b/src/tmail/tmail.c
@@ -35,6 +35,7 @@ extern int errno;		/* just in case */
 #include <sys/stat.h>
 #include "c-client.h"
 #include "tquota.h"
+#include <ctype.h>
 
 
 /* Globals */