diff --git a/Makefile b/Makefile
index 5093eb2..e8f25e0 100644
--- a/Makefile
+++ b/Makefile
@@ -184,7 +184,7 @@ LDSCRIPT = STM32F405RGTx_FLASH.ld
 # libraries
 LIBS = -lc -lm -lnosys 
 LIBDIR = 
-LDFLAGS = $(MCU) -specs=nano.specs -T$(LDSCRIPT) $(LIBDIR) $(LIBS) -Wl,-Map=$(BUILD_DIR)/$(TARGET).map,--cref -Wl,--gc-sections
+LDFLAGS = $(MCU) -specs=nano.specs -T$(LDSCRIPT) $(LIBDIR) $(LIBS) -Wl,-Map=$(BUILD_DIR)/$(TARGET).map,--cref -Wl,--gc-sections -u _printf_float
 
 # default action: build all
 all: $(BUILD_DIR)/$(TARGET).elf $(BUILD_DIR)/$(TARGET).hex $(BUILD_DIR)/$(TARGET).bin