diff --git a/py/circuitpy_defns.mk b/py/circuitpy_defns.mk
index 1cb19ff61d..af5b305b63 100644
--- a/py/circuitpy_defns.mk
+++ b/py/circuitpy_defns.mk
@@ -877,4 +877,4 @@ invalid-board:
 # Print out the value of a make variable.
 # https://stackoverflow.com/questions/16467718/how-to-print-out-a-variable-in-makefile
 print-%:
-	@echo $* = $($*)
+	@echo "$* = "$($*)