diff --git a/lib/libtpool/thread_pool.c b/lib/libtpool/thread_pool.c
index 3eef3d1e48..7802f8c175 100644
--- a/lib/libtpool/thread_pool.c
+++ b/lib/libtpool/thread_pool.c
@@ -28,6 +28,7 @@
 #include <signal.h>
 #include <errno.h>
 #include <assert.h>
+#include <limits.h>
 #include "thread_pool_impl.h"
 
 static pthread_mutex_t thread_pool_lock = PTHREAD_MUTEX_INITIALIZER;
diff --git a/lib/libzpool/kernel.c b/lib/libzpool/kernel.c
index 77264470ba..0e3e4cee7b 100644
--- a/lib/libzpool/kernel.c
+++ b/lib/libzpool/kernel.c
@@ -31,6 +31,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <limits.h>
 #include <libzutil.h>
 #include <sys/crypto/icp.h>
 #include <sys/processor.h>