diff --git a/auth-sia.c b/auth-sia.c
index 051d152cf..7c97f03e5 100644
--- a/auth-sia.c
+++ b/auth-sia.c
@@ -36,6 +36,7 @@
 #include <string.h>
 
 #include "ssh.h"
+#include "ssh_api.h"
 #include "key.h"
 #include "hostfile.h"
 #include "auth.h"
diff --git a/openbsd-compat/port-aix.c b/openbsd-compat/port-aix.c
index 768d44c33..79c868966 100644
--- a/openbsd-compat/port-aix.c
+++ b/openbsd-compat/port-aix.c
@@ -32,6 +32,7 @@
 #include "hostfile.h"
 #include "auth.h"
 #include "ssh.h"
+#include "ssh_api.h"
 #include "log.h"
 
 #ifdef _AIX
diff --git a/openbsd-compat/port-uw.c b/openbsd-compat/port-uw.c
index ba675acd6..014cac264 100644
--- a/openbsd-compat/port-uw.c
+++ b/openbsd-compat/port-uw.c
@@ -47,6 +47,7 @@
 #include "hostfile.h"
 #include "auth.h"
 #include "ssh.h"
+#include "ssh_api.h"
 
 int nischeck(char *);