diff --git a/radio/src/Makefile b/radio/src/Makefile
index b280079c1..d05badd02 100644
--- a/radio/src/Makefile
+++ b/radio/src/Makefile
@@ -1340,7 +1340,7 @@ bootloader.lbm: bootloader/bootloader_ramBoot.bin
 
 .PHONY bootloader/bootloader_ramBoot.bin:
 	@echo "Building bootloader..."
-	$(MAKE) -C bootloader PCB=$(PCB) PCBREV=$(PCBREV)
+	$(MAKE) -C bootloader PCB=$(PCB) PCBREV=$(PCBREV) NANO=$(NANO)
 else ifeq ($(PCB), 9XRPRO)
 bootloader.lbm:
 	@echo "Fetching Mike's bootloader..."
diff --git a/radio/src/bootloader/Makefile b/radio/src/bootloader/Makefile
index e1822258b..613d65720 100644
--- a/radio/src/bootloader/Makefile
+++ b/radio/src/bootloader/Makefile
@@ -262,9 +262,15 @@ CPPXOBJS  = $(CPPSRC:%.cpp=%.o)
 LIBS    = $(DLIBS) $(ULIBS)
 MCFLAGS = -mcpu=$(MCU)
 
+ifeq ($(NANO), YES)
+  # use newlib-nano for linking
+  # NEWLIB_NANO_FLAGS = --specs=nano.specs -u _printf_float   #use this version if printf for floats is needed!
+  NEWLIB_NANO_FLAGS = --specs=nano.specs
+endif
+
 #ASFLAGS = $(MCFLAGS) -g -gdwarf-2 -Wa,-amhls=$(OBJDIR)/$(notdir $(<:.s=.lst)) $(ADEFS)
 CPFLAGS = $(MCFLAGS) $(OPT) -gdwarf-2 -mthumb -fomit-frame-pointer -Wall -Wstrict-prototypes -fverbose-asm $(DEFS)
-LDFLAGS = $(MCFLAGS) -mthumb -nostartfiles -T$(LDSCRIPT) -Wl,-Map=$(FULL_PRJ).map,--cref,--no-warn-mismatch $(LIBDIR) --specs=nano.specs
+LDFLAGS = $(MCFLAGS) -mthumb -nostartfiles -T$(LDSCRIPT) -Wl,-Map=$(FULL_PRJ).map,--cref,--no-warn-mismatch $(LIBDIR) $(NEWLIB_NANO_FLAGS)
 CPPFLAGS = $(MCFLAGS) $(OPT) -gdwarf-2 -mthumb -fomit-frame-pointer -Wall -fverbose-asm $(DEFS)
 
 CPPFLAGS += $(CPPDEFS)