diff --git a/ports/stm32/boards/PYBLITEV10/mpconfigboard.mk b/ports/stm32/boards/PYBLITEV10/mpconfigboard.mk
index 7469866476..461886b63c 100644
--- a/ports/stm32/boards/PYBLITEV10/mpconfigboard.mk
+++ b/ports/stm32/boards/PYBLITEV10/mpconfigboard.mk
@@ -8,20 +8,20 @@ TEXT1_ADDR = 0x08020000
 # Provide different variants for the downloads page.
 BOARD_VARIANTS += "dp thread dp-thread network"
 
-ifeq ($(BOARD_VARIANT),"dp")
+ifeq ($(BOARD_VARIANT),dp)
 MICROPY_FLOAT_IMPL=double
 endif
 
-ifeq ($(BOARD_VARIANT),"thread")
+ifeq ($(BOARD_VARIANT),thread)
 CFLAGS += -DMICROPY_PY_THREAD=1
 endif
 
-ifeq ($(BOARD_VARIANT),"dp-thread")
+ifeq ($(BOARD_VARIANT),dp-thread)
 MICROPY_FLOAT_IMPL=double
 CFLAGS += -DMICROPY_PY_THREAD=1
 endif
 
-ifeq ($(BOARD_VARIANT),"network")
+ifeq ($(BOARD_VARIANT),network)
 MICROPY_PY_NETWORK_WIZNET5K=5200
 endif
 
diff --git a/ports/stm32/boards/PYBV10/mpconfigboard.mk b/ports/stm32/boards/PYBV10/mpconfigboard.mk
index af28782678..363f6b4806 100644
--- a/ports/stm32/boards/PYBV10/mpconfigboard.mk
+++ b/ports/stm32/boards/PYBV10/mpconfigboard.mk
@@ -18,20 +18,20 @@ MICROPY_VFS_LFS2 = 1
 # Provide different variants for the downloads page.
 BOARD_VARIANTS += "dp thread dp-thread network"
 
-ifeq ($(BOARD_VARIANT),"dp")
+ifeq ($(BOARD_VARIANT),dp)
 MICROPY_FLOAT_IMPL=double
 endif
 
-ifeq ($(BOARD_VARIANT),"thread")
+ifeq ($(BOARD_VARIANT),thread)
 CFLAGS += -DMICROPY_PY_THREAD=1
 endif
 
-ifeq ($(BOARD_VARIANT),"dp-thread")
+ifeq ($(BOARD_VARIANT),dp-thread)
 MICROPY_FLOAT_IMPL=double
 CFLAGS += -DMICROPY_PY_THREAD=1
 endif
 
-ifeq ($(BOARD_VARIANT),"network")
+ifeq ($(BOARD_VARIANT),network)
 MICROPY_PY_NETWORK_WIZNET5K=5200
 endif
 
diff --git a/ports/stm32/boards/PYBV11/mpconfigboard.mk b/ports/stm32/boards/PYBV11/mpconfigboard.mk
index cf7884cfc6..857049f215 100644
--- a/ports/stm32/boards/PYBV11/mpconfigboard.mk
+++ b/ports/stm32/boards/PYBV11/mpconfigboard.mk
@@ -18,20 +18,20 @@ MICROPY_VFS_LFS2 = 1
 # Provide different variants for the downloads page.
 BOARD_VARIANTS += "dp thread dp-thread network"
 
-ifeq ($(BOARD_VARIANT),"dp")
+ifeq ($(BOARD_VARIANT),dp)
 MICROPY_FLOAT_IMPL=double
 endif
 
-ifeq ($(BOARD_VARIANT),"thread")
+ifeq ($(BOARD_VARIANT),thread)
 CFLAGS += -DMICROPY_PY_THREAD=1
 endif
 
-ifeq ($(BOARD_VARIANT),"dp-thread")
+ifeq ($(BOARD_VARIANT),dp-thread)
 MICROPY_FLOAT_IMPL=double
 CFLAGS += -DMICROPY_PY_THREAD=1
 endif
 
-ifeq ($(BOARD_VARIANT),"network")
+ifeq ($(BOARD_VARIANT),network)
 MICROPY_PY_NETWORK_WIZNET5K=5200
 endif