diff --git a/crypto/asn1/tasn_utl.c b/crypto/asn1/tasn_utl.c
index 16b2c1478..2e18f9f3f 100644
--- a/crypto/asn1/tasn_utl.c
+++ b/crypto/asn1/tasn_utl.c
@@ -58,6 +58,7 @@
 
 
 #include <stddef.h>
+#include <string.h>
 #include <openssl/asn1.h>
 #include <openssl/asn1t.h>
 #include <openssl/objects.h>
diff --git a/crypto/ocsp/ocsp_vfy.c b/crypto/ocsp/ocsp_vfy.c
index 4ac7e821e..c4f513a3b 100644
--- a/crypto/ocsp/ocsp_vfy.c
+++ b/crypto/ocsp/ocsp_vfy.c
@@ -58,6 +58,7 @@
 
 #include <openssl/ocsp.h>
 #include <openssl/err.h>
+#include <string.h>
 
 static int ocsp_find_signer(X509 **psigner, OCSP_BASICRESP *bs, STACK_OF(X509) *certs,
 				X509_STORE *st, unsigned long flags);