diff --git a/sbin/geom/core/geom.c b/sbin/geom/core/geom.c
index 67f19191ff6..ea28819d065 100644
--- a/sbin/geom/core/geom.c
+++ b/sbin/geom/core/geom.c
@@ -519,6 +519,9 @@ set_class_name(void)
 {
 	char *s1, *s2;
 
+	s1 = class_name;
+	for (; *s1 != '\0'; s1++)
+		*s1 = tolower(*s1);
 	gclass_name = malloc(strlen(class_name));
 	if (gclass_name == NULL)
 		errx(EXIT_FAILURE, "No memory");