diff --git a/source/sign.c b/source/sign.c
index 6236dea..84586a2 100644
--- a/source/sign.c
+++ b/source/sign.c
@@ -7,6 +7,7 @@
 
 #include <openssl/evp.h>
 #include <openssl/pem.h>
+#include <openssl/ssl.h>
 #include <openssl/x509.h>
 #include <openssl/x509v3.h>
 
@@ -168,6 +169,8 @@ int do_sign(int argc, char *argv[])
 		return -1;
 	}
 
+	SSL_load_error_strings();
+	SSL_library_init();
 	OpenSSL_add_all_algorithms();
 
 	if (!(key = open_priv_key(args.key))) {
diff --git a/source/verify.c b/source/verify.c
index 0b84e32..75c86f2 100644
--- a/source/verify.c
+++ b/source/verify.c
@@ -9,6 +9,7 @@
 
 #include <openssl/evp.h>
 #include <openssl/pem.h>
+#include <openssl/ssl.h>
 #include <openssl/x509.h>
 #include <openssl/x509v3.h>
 
@@ -229,6 +230,8 @@ int do_verify(int argc, char *argv[])
 		return -1;
 	}
 
+	SSL_load_error_strings();
+	SSL_library_init();
 	OpenSSL_add_all_algorithms();
 
 	if (verify_all(&count, &total, args.certs, args.image) < 0) {