diff --git a/sigrok.h.in b/sigrok.h.in
index 304f1d8f..3e6f24e8 100644
--- a/sigrok.h.in
+++ b/sigrok.h.in
@@ -170,7 +170,6 @@ enum {
 /* sr_datafeed_analog.unit values */
 enum {
 	SR_UNIT_VOLTAGE,
-	SR_UNIT_CURRENT,
 };
 
 struct sr_datafeed_packet {