diff --git a/src/interfaces/libpq/fe-connect.c b/src/interfaces/libpq/fe-connect.c
index 4de86f28463..10e77d186cf 100644
--- a/src/interfaces/libpq/fe-connect.c
+++ b/src/interfaces/libpq/fe-connect.c
@@ -220,7 +220,7 @@ static const PQconninfoOption PQconninfoOptions[] = {
 	 * to exclude them since none of them are mandatory.
 	 */
 	{"sslmode", "PGSSLMODE", DefaultSSLMode, NULL,
-	"SSL-Mode", "", 8},			/* sizeof("disable") == 8 */
+	"SSL-Mode", "", 12},			/* sizeof("verify-full") == 12 */
 
 	{"sslcompression", "PGSSLCOMPRESSION", "1", NULL,
 	"SSL-Compression", "", 1},