diff --git a/src/include/openssl/conf.h b/src/include/openssl/conf.h
index 8b82fd4..b8ec12e 100644
--- a/src/include/openssl/conf.h
+++ b/src/include/openssl/conf.h
@@ -180,5 +180,6 @@
 #define CONF_R_NO_CLOSE_BRACE 103
 #define CONF_R_UNABLE_TO_CREATE_NEW_SECTION 104
 #define CONF_R_VARIABLE_HAS_NO_VALUE 105
+#define CONF_R_VARIABLE_EXPANSION_TOO_LONG 106
 
 #endif  /* OPENSSL_HEADER_THREAD_H */