diff --git a/esp32/Makefile b/esp32/Makefile
index 742dae3c04..fa9d78bdab 100644
--- a/esp32/Makefile
+++ b/esp32/Makefile
@@ -91,6 +91,19 @@ CFLAGS_XTENSA_PSRAM = -mfix-esp32-psram-cache-issue
 CFLAGS = $(CFLAGS_XTENSA) $(CFLAGS_XTENSA_PSRAM) $(CFLAGS_XTENSA_OPT) -nostdlib -std=gnu99 -g3 -ggdb -fstrict-volatile-bitfields -Iboards/$(BOARD)
 CFLAGS_SIGFOX = $(CFLAGS_XTENSA) -O2 -nostdlib -std=gnu99 -g3 -ggdb -fstrict-volatile-bitfields -Iboards/$(BOARD)
 
+# Configure floating point support
+ifeq ($(MICROPY_FLOAT_IMPL),double)
+CFLAGS += -DMICROPY_FLOAT_IMPL=MICROPY_FLOAT_IMPL_DOUBLE
+else
+ifeq ($(MICROPY_FLOAT_IMPL),none)
+CFLAGS += -DMICROPY_FLOAT_IMPL=MICROPY_FLOAT_IMPL_NONE
+else
+ifeq ($(MICROPY_FLOAT_IMPL),single)
+CFLAGS += -DMICROPY_FLOAT_IMPL=MICROPY_FLOAT_IMPL_FLOAT
+endif
+endif
+endif
+
 LDFLAGS = -nostdlib -Wl,-Map=$(@:.elf=.map) -Wl,--no-check-sections -u call_user_start_cpu0
 LDFLAGS += -Wl,-static -Wl,--undefined=uxTopUsedPriority -Wl,--gc-sections
 
diff --git a/esp32/mpconfigport.h b/esp32/mpconfigport.h
index 9870415bd2..e6d2228138 100644
--- a/esp32/mpconfigport.h
+++ b/esp32/mpconfigport.h
@@ -101,7 +101,9 @@
 #define MICROPY_PY_UTIMEQ                           (1)
 #define MICROPY_CPYTHON_COMPAT                      (1)
 #define MICROPY_LONGINT_IMPL                        (MICROPY_LONGINT_IMPL_MPZ)
+#ifndef MICROPY_FLOAT_IMPL   // can be configured by make option
 #define MICROPY_FLOAT_IMPL                          (MICROPY_FLOAT_IMPL_FLOAT)
+#endif
 #define MICROPY_ERROR_REPORTING                     (MICROPY_ERROR_REPORTING_NORMAL)
 #define MICROPY_OPT_COMPUTED_GOTO                   (1)
 #define MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE    (0)