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-rw-r--r--include/unistd.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/unistd.h b/include/unistd.h
index 6925541..3b144f6 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -9,6 +9,7 @@ typedef uint16_t pid_t;
#define __SYS_time 1
#define __SYS_getpid 2
#define __SYS_getpdir 3
+#define __SYS_signal 4
#define _syscall0(type, name) \
type name(void) { \