diff --git a/clients/tools/ldapcompare.c b/clients/tools/ldapcompare.c
index f7347c7b3d..317224acfc 100644
--- a/clients/tools/ldapcompare.c
+++ b/clients/tools/ldapcompare.c
@@ -46,6 +46,7 @@
 #include <ac/string.h>
 #include <ac/unistd.h>
 #include <ac/errno.h>
+#include <ac/socket.h>
 #include <ac/time.h>
 #include <sys/stat.h>
 
diff --git a/clients/tools/ldapdelete.c b/clients/tools/ldapdelete.c
index 2e7d42f82b..518140fac4 100644
--- a/clients/tools/ldapdelete.c
+++ b/clients/tools/ldapdelete.c
@@ -39,6 +39,7 @@
 #include <ac/ctype.h>
 #include <ac/string.h>
 #include <ac/unistd.h>
+#include <ac/socket.h>
 #include <ac/time.h>
 
 #include <ldap.h>
diff --git a/clients/tools/ldapmodify.c b/clients/tools/ldapmodify.c
index 69443df038..c88bb07768 100644
--- a/clients/tools/ldapmodify.c
+++ b/clients/tools/ldapmodify.c
@@ -42,6 +42,7 @@
 #include <ac/ctype.h>
 #include <ac/string.h>
 #include <ac/unistd.h>
+#include <ac/socket.h>
 #include <ac/time.h>
 
 #ifdef HAVE_SYS_STAT_H
diff --git a/clients/tools/ldapmodrdn.c b/clients/tools/ldapmodrdn.c
index 4c77b6fbed..2841d7e087 100644
--- a/clients/tools/ldapmodrdn.c
+++ b/clients/tools/ldapmodrdn.c
@@ -52,6 +52,7 @@
 #include <ac/ctype.h>
 #include <ac/string.h>
 #include <ac/unistd.h>
+#include <ac/socket.h>
 #include <ac/time.h>
 
 #include <ldap.h>