diff --git a/lib/libc/ia64/gen/makecontext.c b/lib/libc/ia64/gen/makecontext.c
index 8a9e566d099..bee47f11ce5 100644
--- a/lib/libc/ia64/gen/makecontext.c
+++ b/lib/libc/ia64/gen/makecontext.c
@@ -32,6 +32,8 @@ __FBSDID("$FreeBSD$");
 #include <machine/fpu.h>
 #include <stdarg.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
 struct fdesc {
 	uint64_t ip;
diff --git a/lib/libc/ia64/gen/signalcontext.c b/lib/libc/ia64/gen/signalcontext.c
index 6d09746e72c..b47daf37d9e 100644
--- a/lib/libc/ia64/gen/signalcontext.c
+++ b/lib/libc/ia64/gen/signalcontext.c
@@ -32,6 +32,8 @@ __FBSDID("$FreeBSD$");
 #include <machine/fpu.h>
 #include <signal.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <strings.h>
 
 struct fdesc {