diff --git a/os_port.c b/os_port.c
index 1d09d31..dc634d1 100644
--- a/os_port.c
+++ b/os_port.c
@@ -243,7 +243,7 @@ void HardFault_Handler_C(ContextStateFrame_t* frame, uint32_t lr_value){
     // "thumb instruction interworking" bit set
     frame->xpsr = (1 << 24);
 #else
-    while(1);
+    while(1){}
 #endif
 }
 
diff --git a/os_port_armcc.S b/os_port_armcc.S
index f159f77..10ee3e4 100644
--- a/os_port_armcc.S
+++ b/os_port_armcc.S
@@ -69,6 +69,7 @@ __PendSV_SwitchTo
 
 HardFault_Handler PROC
     EXPORT  HardFault_Handler
+    IMPORT  HardFault_Handler_C
         tst lr, #4                           // 检查 EXC_RETURN (LR) 的位 2
         ite eq
         mrseq r0, msp                        // 如果位 2 是 0，栈帧在 MSP
diff --git a/os_port_gnu.S b/os_port_gnu.S
index 0f1fc63..9fa99e2 100644
--- a/os_port_gnu.S
+++ b/os_port_gnu.S
@@ -78,6 +78,7 @@ cpu_clz:
 
     .section .text.HardFault_Handler,"ax",%progbits
     .global HardFault_Handler
+    .global HardFault_Handler_C
     .thumb_func
 HardFault_Handler:
     tst lr, #4