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-rw-r--r--py/circuitpy_mpconfig.mk2
1 files changed, 1 insertions, 1 deletions
diff --git a/py/circuitpy_mpconfig.mk b/py/circuitpy_mpconfig.mk
index be1e0ad9a..95e3512f1 100644
--- a/py/circuitpy_mpconfig.mk
+++ b/py/circuitpy_mpconfig.mk
@@ -110,7 +110,7 @@ endif
CFLAGS += -DCIRCUITPY_DIGITALIO=$(CIRCUITPY_DIGITALIO)
ifndef CIRCUITPY_COUNTIO
-CIRCUITPY_COUNTIO ?= 1
+CIRCUITPY_COUNTIO = 1
endif
CFLAGS += -DCIRCUITPY_COUNTIO=$(CIRCUITPY_COUNTIO)