diff --git a/libc/kernel/tools/defaults.py b/libc/kernel/tools/defaults.py
index b4d823e..8c41cc6 100644
--- a/libc/kernel/tools/defaults.py
+++ b/libc/kernel/tools/defaults.py
@@ -63,6 +63,9 @@
     # The kernel's _NSIG/NSIG are one less than the userspace value, so we need to move them aside.
     "_NSIG": "_KERNEL__NSIG",
     "NSIG": "_KERNEL_NSIG",
+    # The kernel's SIGRTMIN/SIGRTMAX are absolute limits; userspace steals a few.
+    "SIGRTMIN": "__SIGRTMIN",
+    "SIGRTMAX": "__SIGRTMAX",
     }
 
 # this is the set of known static inline functions that we want to keep
diff --git a/libc/kernel/uapi/asm-arm/asm/signal.h b/libc/kernel/uapi/asm-arm/asm/signal.h
index 512e22a..fd39aaa 100644
--- a/libc/kernel/uapi/asm-arm/asm/signal.h
+++ b/libc/kernel/uapi/asm-arm/asm/signal.h
@@ -66,8 +66,8 @@
 #define SIGSYS 31
 #define SIGUNUSED 31
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define SIGRTMIN 32
-#define SIGRTMAX _KERNEL__NSIG
+#define __SIGRTMIN 32
+#define __SIGRTMAX _KERNEL__NSIG
 #define SIGSWI 32
 #define SA_NOCLDSTOP 0x00000001
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
diff --git a/libc/kernel/uapi/asm-generic/signal.h b/libc/kernel/uapi/asm-generic/signal.h
index fe7d9a0..a16622a 100644
--- a/libc/kernel/uapi/asm-generic/signal.h
+++ b/libc/kernel/uapi/asm-generic/signal.h
@@ -66,9 +66,9 @@
 #define SIGSYS 31
 #define SIGUNUSED 31
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define SIGRTMIN 32
+#define __SIGRTMIN 32
 #ifndef SIGRTMAX
-#define SIGRTMAX _KERNEL__NSIG
+#define __SIGRTMAX _KERNEL__NSIG
 #endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SA_NOCLDSTOP 0x00000001
diff --git a/libc/kernel/uapi/asm-mips/asm/signal.h b/libc/kernel/uapi/asm-mips/asm/signal.h
index 53f5015..b774a66 100644
--- a/libc/kernel/uapi/asm-mips/asm/signal.h
+++ b/libc/kernel/uapi/asm-mips/asm/signal.h
@@ -71,8 +71,8 @@
 #define SIGXCPU 30
 #define SIGXFSZ 31
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define SIGRTMIN 32
-#define SIGRTMAX _KERNEL__NSIG
+#define __SIGRTMIN 32
+#define __SIGRTMAX _KERNEL__NSIG
 #define SA_ONSTACK 0x08000000
 #define SA_RESETHAND 0x80000000
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
diff --git a/libc/kernel/uapi/asm-x86/asm/signal.h b/libc/kernel/uapi/asm-x86/asm/signal.h
index 6f5b435..308c7a9 100644
--- a/libc/kernel/uapi/asm-x86/asm/signal.h
+++ b/libc/kernel/uapi/asm-x86/asm/signal.h
@@ -71,8 +71,8 @@
 #define SIGSYS 31
 #define SIGUNUSED 31
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define SIGRTMIN 32
-#define SIGRTMAX _KERNEL__NSIG
+#define __SIGRTMIN 32
+#define __SIGRTMAX _KERNEL__NSIG
 #define SA_NOCLDSTOP 0x00000001u
 #define SA_NOCLDWAIT 0x00000002u
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */