diff --git a/src/thread/nt32/syscall_cp.s b/src/thread/nt32/syscall_cp.s
index 1f5142c..2b06d3b 100644
--- a/src/thread/nt32/syscall_cp.s
+++ b/src/thread/nt32/syscall_cp.s
@@ -1,19 +1,28 @@
 .text
-.globl	___syscall_cp_asm
-.globl	___cp_begin
-.globl	___cp_end
+.globl ___cp_begin
+.globl ___cp_end
+.globl ___cp_cancel
+.globl ___syscall_cp_asm
+
+.def ___cp_begin;       .scl 2; .type 32; .endef
+.def ___cp_end;         .scl 2; .type 32; .endef
+.def ___cp_cancel;      .scl 2; .type 32; .endef
+.def ___syscall_cp_asm; .scl 2; .type 32; .endef
 
 ___syscall_cp_asm:
 ___cp_begin:
 	mov 	(%ecx),	%ecx	# check content of ptr
 	test	%ecx,	%ecx
-	jnz	___cancel	# thread is pending cancellation
+	jnz	___cp_cancel	# thread is pending cancellation
 
 	jmp	___syscall
 
 ___cp_end:
 	ret
 
+___cp_cancel:
+	jmp	___cancel
+
         .section .got$___syscall_cp_asm
         .global __imp____syscall_cp_asm
 __imp____syscall_cp_asm:
@@ -31,3 +40,9 @@ __imp____cp_begin:
 __imp____cp_end:
         .long   ___cp_end
         .linkonce discard
+
+        .section .got$___cp_cancel
+        .global __imp____cp_cancel
+__imp____cp_cancel:
+        .long   ___cp_cancel
+        .linkonce discard
diff --git a/src/thread/nt64/syscall_cp.s b/src/thread/nt64/syscall_cp.s
index 7d4cbaf..27b649d 100644
--- a/src/thread/nt64/syscall_cp.s
+++ b/src/thread/nt64/syscall_cp.s
@@ -1,13 +1,19 @@
 .text
-.globl	__syscall_cp_asm
-.globl	__cp_begin
-.globl	__cp_end
+.global __cp_begin
+.global __cp_end
+.global __cp_cancel
+.global __syscall_cp_asm
+
+.def __cp_begin;       .scl 2; .type 32; .endef
+.def __cp_end;         .scl 2; .type 32; .endef
+.def __cp_cancel;      .scl 2; .type 32; .endef
+.def __syscall_cp_asm; .scl 2; .type 32; .endef
 
 __syscall_cp_asm:
 __cp_begin:
 	movq	(%rcx),	%rcx		# check content of ptr
 	test	%ecx,	%ecx
-	jnz	__cancel		# thread is pending cancellation
+	jnz	__cp_cancel		# thread is pending cancellation
 
 	movq	%rdx,	    %rcx	# move water
 	movq	%r8,	    %rdx	# from one glass
@@ -28,19 +34,30 @@ __cp_begin:
 __cp_end:
 	ret
 
+__cp_cancel:
+	jmp	__cancel
+
 
 	.section .got$__syscall_cp_asm
 	.global __imp___syscall_cp_asm
 __imp___syscall_cp_asm:
 	.quad __syscall_cp_asm
-
+	.linkonce discard
 
 	.section .got$__cp_begin
 	.global __imp___cp_begin
 __imp___cp_begin:
 	.quad __cp_begin
+	.linkonce discard
 
 	.section .got$__cp_end
 	.global __imp___cp_end
 __imp___cp_end:
 	.quad __cp_end
+	.linkonce discard
+
+	.section .got$__cp_cancel
+	.global __imp___cp_cancel
+__imp___cp_cancel:
+	.quad __cp_cancel
+	.linkonce discard