diff --git a/libc/kernel/uapi/asm-generic/signal-defs.h b/libc/kernel/uapi/asm-generic/signal-defs.h
index a6de2e4..c7e9504 100644
--- a/libc/kernel/uapi/asm-generic/signal-defs.h
+++ b/libc/kernel/uapi/asm-generic/signal-defs.h
@@ -19,6 +19,31 @@
 #ifndef __ASM_GENERIC_SIGNAL_DEFS_H
 #define __ASM_GENERIC_SIGNAL_DEFS_H
 #include <linux/compiler.h>
+#ifndef SA_NOCLDSTOP
+#define SA_NOCLDSTOP 0x00000001
+#endif
+#ifndef SA_NOCLDWAIT
+#define SA_NOCLDWAIT 0x00000002
+#endif
+#ifndef SA_SIGINFO
+#define SA_SIGINFO 0x00000004
+#endif
+#define SA_UNSUPPORTED 0x00000400
+#define SA_EXPOSE_TAGBITS 0x00000800
+#ifndef SA_ONSTACK
+#define SA_ONSTACK 0x08000000
+#endif
+#ifndef SA_RESTART
+#define SA_RESTART 0x10000000
+#endif
+#ifndef SA_NODEFER
+#define SA_NODEFER 0x40000000
+#endif
+#ifndef SA_RESETHAND
+#define SA_RESETHAND 0x80000000
+#endif
+#define SA_NOMASK SA_NODEFER
+#define SA_ONESHOT SA_RESETHAND
 #ifndef SIG_BLOCK
 #define SIG_BLOCK 0
 #endif