diff --git a/examples/lm4f/Makefile.include b/examples/lm4f/Makefile.include
index 4d2675c5..60987e8d 100644
--- a/examples/lm4f/Makefile.include
+++ b/examples/lm4f/Makefile.include
@@ -36,7 +36,7 @@ $(info We seem to be building the example in the source directory. Using local l
 endif
 endif
 
-ARCH_FLAGS      = -mthumb -mcpu=cortex-m4
+ARCH_FLAGS      = -mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16
 CFLAGS		+= -O0 -g3 -Wall -Wextra -I$(TOOLCHAIN_DIR)/include \
 		   -fno-common $(ARCH_FLAGS) -MD -DLM4F
 LDSCRIPT	?= $(BINARY).ld
diff --git a/lib/lm4f/Makefile b/lib/lm4f/Makefile
index c4c2aa73..8f4c1519 100644
--- a/lib/lm4f/Makefile
+++ b/lib/lm4f/Makefile
@@ -24,7 +24,7 @@ PREFIX		?= arm-none-eabi
 CC		= $(PREFIX)-gcc
 AR		= $(PREFIX)-ar
 CFLAGS		= -Os -g -Wall -Wextra -I../../include -fno-common \
-		  -mcpu=cortex-m4 -mthumb -Wstrict-prototypes \
+		  -mcpu=cortex-m4 -mthumb -mfloat-abi=hard -Wstrict-prototypes \
 		  -ffunction-sections -fdata-sections -MD -DLM4F
 # ARFLAGS	= rcsv
 ARFLAGS		= rcs