diff --git a/src/bin/psql/command.c b/src/bin/psql/command.c index 288c1a8c93..fae5940b54 100644 --- a/src/bin/psql/command.c +++ b/src/bin/psql/command.c @@ -3896,7 +3896,7 @@ printSSLInfo(void) protocol ? protocol : _("unknown"), cipher ? cipher : _("unknown"), (compression && strcmp(compression, "off") != 0) ? _("on") : _("off"), - alpn ? alpn : _("none")); + (alpn && alpn[0] != '\0') ? alpn : _("none")); } /* diff --git a/src/interfaces/libpq/fe-secure-openssl.c b/src/interfaces/libpq/fe-secure-openssl.c index e7a4d006e1..33362000d3 100644 --- a/src/interfaces/libpq/fe-secure-openssl.c +++ b/src/interfaces/libpq/fe-secure-openssl.c @@ -1837,7 +1837,7 @@ PQsslAttribute(PGconn *conn, const char *attribute_name) SSL_get0_alpn_selected(conn->ssl, &data, &len); if (data == NULL || len == 0 || len > sizeof(alpn_str) - 1) - return NULL; + return ""; memcpy(alpn_str, data, len); alpn_str[len] = 0; return alpn_str;