diff --git a/crypto/asn1/tasn_new.c b/crypto/asn1/tasn_new.c
index 8a2b27d..b68eed7 100644
--- a/crypto/asn1/tasn_new.c
+++ b/crypto/asn1/tasn_new.c
@@ -56,6 +56,8 @@
 
 #include <openssl/asn1.h>
 
+#include <string.h>
+
 #include <openssl/asn1t.h>
 #include <openssl/err.h>
 #include <openssl/mem.h>