diff --git a/config_cortex_m33.mk b/config_cortex_m33.mk
index 7ba9f54..a3d0ca6 100644
--- a/config_cortex_m33.mk
+++ b/config_cortex_m33.mk
@@ -13,7 +13,7 @@
 
 
 #environment variables
-ARCH_CFLAGS = -mcpu=cortex-m33 -mthumb -mlittle-endian -mfpu=fpv4-sp-d16 -mfloat-abi=hard -fsingle-precision-constant
+ARCH_CFLAGS = -mcpu=cortex-m33 -mthumb -mlittle-endian -mfpu=fpv5-sp-d16 -mfloat-abi=hard -fsingle-precision-constant
 OPT_CFLAGS = -fdata-sections -ffunction-sections
 
 PLATFORM_CFLAGS = -Wno-unused-parameter -nostdinc -ffreestanding -fno-builtin -fsigned-char -fno-common -Wno-main -I$(shell $(CC) -print-search-dirs | $(AWK) '$$1 == "install:" {print $$NF}')include