diff --git a/lib/cyassl.c b/lib/cyassl.c
index 6f15b8ebd406da14daab262aceff54bce23e1689..7a089ccc25cbf1e41ecc70fc56de19740c1ce795 100644
--- a/lib/cyassl.c
+++ b/lib/cyassl.c
@@ -30,6 +30,10 @@
 
 #ifdef USE_CYASSL
 
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif
diff --git a/lib/security.c b/lib/security.c
index a5567526ead78b58025b8cbd0ea9839b39d7005a..536d7c229be1fe7e6552034105f5c51e9adb3bc9 100644
--- a/lib/security.c
+++ b/lib/security.c
@@ -54,6 +54,10 @@
 #include <unistd.h>
 #endif
 
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
 #include "urldata.h"
 #include "curl_base64.h"
 #include "curl_memory.h"