diff --git a/crypto/asn1/a_gentm.c b/crypto/asn1/a_gentm.c
index 355feff..be093a4 100644
--- a/crypto/asn1/a_gentm.c
+++ b/crypto/asn1/a_gentm.c
@@ -57,6 +57,7 @@
 #include <openssl/asn1.h>
 
 #include <string.h>
+#include <time.h>
 
 #include <openssl/err.h>
 #include <openssl/mem.h>
diff --git a/crypto/asn1/a_time.c b/crypto/asn1/a_time.c
index f0badcc..e02e858 100644
--- a/crypto/asn1/a_time.c
+++ b/crypto/asn1/a_time.c
@@ -57,6 +57,7 @@
 #include <openssl/asn1.h>
 
 #include <string.h>
+#include <time.h>
 
 #include <openssl/asn1t.h>
 #include <openssl/buf.h>
diff --git a/crypto/asn1/a_utctm.c b/crypto/asn1/a_utctm.c
index 9304377..52b010f 100644
--- a/crypto/asn1/a_utctm.c
+++ b/crypto/asn1/a_utctm.c
@@ -57,6 +57,7 @@
 #include <openssl/asn1.h>
 
 #include <string.h>
+#include <time.h>
 
 #include <openssl/err.h>
 #include <openssl/mem.h>
diff --git a/crypto/asn1/tasn_utl.c b/crypto/asn1/tasn_utl.c
index f6045e4..1b9de94 100644
--- a/crypto/asn1/tasn_utl.c
+++ b/crypto/asn1/tasn_utl.c
@@ -62,6 +62,7 @@
 #include <openssl/mem.h>
 #include <openssl/obj.h>
 #include <openssl/err.h>
+#include <openssl/thread.h>
 
 
 /* Utility functions for manipulating fields and offsets */