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-rw-r--r--src/signal/siglongjmp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/signal/siglongjmp.c b/src/signal/siglongjmp.c
index 17129175..600d560c 100644
--- a/src/signal/siglongjmp.c
+++ b/src/signal/siglongjmp.c
@@ -4,7 +4,7 @@
 
 void siglongjmp(sigjmp_buf buf, int ret)
 {
-	unsigned long *flag = buf + sizeof(jmp_buf)/sizeof(long);
+	unsigned long *flag = buf + sizeof(jmp_buf)/sizeof(long) - 1;
 	sigset_t *mask = (void *)(flag + 1);
 	if (*flag)
 		sigprocmask (SIG_SETMASK, mask, NULL);