diff --git a/libc/include/sys/ucontext.h b/libc/include/sys/ucontext.h
index b68d704..8bd8c3b 100644
--- a/libc/include/sys/ucontext.h
+++ b/libc/include/sys/ucontext.h
@@ -59,6 +59,7 @@
 
 typedef int greg_t;
 typedef greg_t gregset_t[NGREG];
+typedef struct user_fpregs fpregset_t;
 
 #include <asm/sigcontext.h>
 typedef struct sigcontext mcontext_t;
@@ -82,6 +83,13 @@
 typedef unsigned long greg_t;
 typedef greg_t gregset_t[NGREG];
 
+struct user_fpsimd_state {
+  long double vregs[32];
+  uint32_t fpsr;
+  uint32_t fpcr;
+};
+typedef struct user_fpsimd_state fpregset_t;
+
 #include <asm/sigcontext.h>
 typedef struct sigcontext mcontext_t;