diff --git a/arch/loongarch64/getcontext.S b/arch/loongarch64/getcontext.S
index 49c90a9..27f4d36 100644
--- a/arch/loongarch64/getcontext.S
+++ b/arch/loongarch64/getcontext.S
@@ -35,11 +35,14 @@ FUNC(libucontext_getcontext)
 	st.d	$s8, $a0, REG_OFFSET(31)
 
 	st.d	$a2, $a0, REG_OFFSET(3)
+	st.d	$zero, $a0, REG_OFFSET(4)
 	st.d	$a3, $a0, REG_OFFSET(22)
 	st.d	$ra, $a0, REG_OFFSET(1)
 
 	st.d	$ra, $a0, (MCONTEXT_PC)
 
+	move	$a0, $zero
+
 	POP_FRAME(libucontext_getcontext)
 
 	jr	$ra
diff --git a/arch/loongarch64/swapcontext.S b/arch/loongarch64/swapcontext.S
index 6cde30e..0d589a4 100644
--- a/arch/loongarch64/swapcontext.S
+++ b/arch/loongarch64/swapcontext.S
@@ -39,6 +39,7 @@ FUNC(libucontext_swapcontext)
 	st.d	$s8, $t5, REG_OFFSET(31)
 
 	st.d	$a3, $t5, REG_OFFSET(3)
+	st.d	$zero, $t5, REG_OFFSET(4)
 	st.d	$a4, $t5, REG_OFFSET(22)
 	st.d	$ra, $t5, REG_OFFSET(1)