diff --git a/gateware/icE1usb/Makefile b/gateware/icE1usb/Makefile
index dcafe27..2d70f72 100644
--- a/gateware/icE1usb/Makefile
+++ b/gateware/icE1usb/Makefile
@@ -43,6 +43,9 @@
 ifeq ($(IGNORE_TIMING),1)
 	NEXTPNR_ARGS += --timing-allow-fail
 endif
+ifeq ($(SINGLE_CHANNEL),1)
+	YOSYS_READ_ARGS += -DWITH_SINGLE_CHANNEL
+endif
 
 # Include default rules
 NO2BUILD_DIR ?= ../build