diff --git a/board/Makefile b/board/Makefile
index af274d2b27e428..ed6dcaa0309fc8 100644
--- a/board/Makefile
+++ b/board/Makefile
@@ -2,7 +2,7 @@ PROJ_NAME = panda
 CFLAGS = -g -Wall
 
 CFLAGS += -mlittle-endian -mthumb -mcpu=cortex-m4
-CFLAGS += -mhard-float -DSTM32F4 -DSTM32F413xx
+CFLAGS += -mhard-float -DSTM32F4 -DSTM32F413xx -mfpu=fpv4-sp-d16 -fsingle-precision-constant
 STARTUP_FILE = startup_stm32f413xx
 
 include build.mk