diff --git a/Makefile b/Makefile
index ece860e..ba233cb 100755
--- a/Makefile
+++ b/Makefile
@@ -1254,6 +1254,7 @@ EXTRA_CFLAGS += -DCONFIG_MP_VHT_HW_TX_MODE
 ifeq ($(CONFIG_PLATFORM_I386_PC), y)
 ## For I386 X86 ToolChain use Hardware FLOATING
 EXTRA_CFLAGS += -mhard-float
+EXTRA_CFLAGS += -DMARK_KERNEL_PFU
 else ifeq ($(CONFIG_PLATFORM_ARM_RPI), y)
 ## For Rpi3: use hardware floating, but not on the api
 EXTRA_CFLAGS += -mfloat-abi=softfp
diff --git a/os_dep/linux/ioctl_mp.c b/os_dep/linux/ioctl_mp.c
index 06233dc..eff4945 100644
--- a/os_dep/linux/ioctl_mp.c
+++ b/os_dep/linux/ioctl_mp.c
@@ -19,6 +19,10 @@
 #include <rtw_mp_ioctl.h>
 #include "../../hal/phydm/phydm_precomp.h"
 
+ifdef MARK_KERNEL_PFU
+	#include <linux/kernel.h>
+	#include <asm/fpu/api.h>
+#endif
 
 #if defined(CONFIG_RTL8723B)
 	#include <rtw_bt_mp.h>
@@ -1718,6 +1722,10 @@ int rtw_mp_tx(struct net_device *dev,
 
 			PMAC_Get_Pkt_Param(&pMptCtx->PMacTxInfo, &pMptCtx->PMacPktInfo);
 
+			#ifdef MARK_KERNEL_PFU
+				kernel_fpu_begin();
+			#endif
+
 			if (MPT_IS_CCK_RATE(pMptCtx->PMacTxInfo.TX_RATE))
 
 				CCK_generator(&pMptCtx->PMacTxInfo, &pMptCtx->PMacPktInfo);
@@ -1726,6 +1734,11 @@ int rtw_mp_tx(struct net_device *dev,
 				/* 24 BIT*/
 				L_SIG_generator(pMptCtx->PMacPktInfo.N_sym, &pMptCtx->PMacTxInfo, &pMptCtx->PMacPktInfo);
 			}
+
+			#ifdef MARK_KERNEL_PFU
+				kernel_fpu_end();
+			#endif
+
 			/*	48BIT*/
 			if (MPT_IS_HT_RATE(pMptCtx->PMacTxInfo.TX_RATE))
 				HT_SIG_generator(&pMptCtx->PMacTxInfo, &pMptCtx->PMacPktInfo);