diff --git a/ports/atmel-samd/mpconfigport.mk b/ports/atmel-samd/mpconfigport.mk
index a82dc8554b..c4d2133c9a 100644
--- a/ports/atmel-samd/mpconfigport.mk
+++ b/ports/atmel-samd/mpconfigport.mk
@@ -100,7 +100,7 @@ endif # samd51
 
 ifeq ($(CHIP_FAMILY),same51)
 
-# No native touchio on SAMD51.
+# No native touchio on SAME51.
 CIRCUITPY_TOUCHIO_USE_NATIVE = 0
 
 # The ?='s allow overriding in mpconfigboard.mk.
@@ -108,7 +108,7 @@ CIRCUITPY_TOUCHIO_USE_NATIVE = 0
 CIRCUITPY_ALARM ?= 1
 CIRCUITPY_PS2IO ?= 1
 CIRCUITPY_SAMD ?= 1
-CIRCUITPY_FLOPPYIO ?= 1
+CIRCUITPY_FLOPPYIO ?= $(CIRCUITPY_FULL_BUILD)
 CIRCUITPY_FRAMEBUFFERIO ?= $(CIRCUITPY_FULL_BUILD)
 CIRCUITPY_RGBMATRIX ?= $(CIRCUITPY_FRAMEBUFFERIO)