diff --git a/lib/libc/gen/posix_spawn.3 b/lib/libc/gen/posix_spawn.3
index 596dac31867..12df7dc4187 100644
--- a/lib/libc/gen/posix_spawn.3
+++ b/lib/libc/gen/posix_spawn.3
@@ -46,9 +46,23 @@
 .Sh SYNOPSIS
 .In spawn.h
 .Ft int
-.Fn posix_spawn "pid_t *restrict pid" "const char *restrict path" "const posix_spawn_file_actions_t *file_actions" "const posix_spawnattr_t *restrict attrp" "char *const argv[restrict]" "char *const envp[restrict]"
+.Fo posix_spawn
+.Fa "pid_t *restrict pid"
+.Fa "const char *restrict path"
+.Fa "const posix_spawn_file_actions_t *file_actions"
+.Fa "const posix_spawnattr_t *restrict attrp"
+.Fa "char *const argv[restrict]"
+.Fa "char *const envp[restrict]"
+.Fc
 .Ft int
-.Fn posix_spawnp "pid_t *restrict pid" "const char *restrict file" "const posix_spawn_file_actions_t *file_actions" "const posix_spawnattr_t *restrict attrp" "char *const argv[restrict]" "char *const envp[restrict]"
+.Fo posix_spawnp
+.Fa "pid_t *restrict pid"
+.Fa "const char *restrict file"
+.Fa "const posix_spawn_file_actions_t *file_actions"
+.Fa "const posix_spawnattr_t *restrict attrp"
+.Fa "char *const argv[restrict]"
+.Fa "char *const envp[restrict]"
+.Fc
 .Sh DESCRIPTION
 The
 .Fn posix_spawn
diff --git a/lib/libc/gen/posix_spawn_file_actions_addopen.3 b/lib/libc/gen/posix_spawn_file_actions_addopen.3
index 0b57999bf4b..5cecb49a614 100644
--- a/lib/libc/gen/posix_spawn_file_actions_addopen.3
+++ b/lib/libc/gen/posix_spawn_file_actions_addopen.3
@@ -47,11 +47,24 @@
 .Sh SYNOPSIS
 .In spawn.h
 .Ft int
-.Fn posix_spawn_file_actions_addopen "posix_spawn_file_actions_t * file_actions" "int fildes" "const char *restrict path" "int oflag" "mode_t mode"
+.Fo posix_spawn_file_actions_addopen
+.Fa "posix_spawn_file_actions_t * file_actions"
+.Fa "int fildes"
+.Fa "const char *restrict path"
+.Fa "int oflag"
+.Fa "mode_t mode"
+.Fc
 .Ft int
-.Fn posix_spawn_file_actions_adddup2 "posix_spawn_file_actions_t * file_actions" "int fildes" "int newfildes"
+.Fo posix_spawn_file_actions_adddup2
+.Fa "posix_spawn_file_actions_t * file_actions"
+.Fa "int fildes"
+.Fa "int newfildes"
+.Fc
 .Ft int
-.Fn posix_spawn_file_actions_addclose "posix_spawn_file_actions_t * file_actions" "int fildes"
+.Fo posix_spawn_file_actions_addclose
+.Fa "posix_spawn_file_actions_t * file_actions"
+.Fa "int fildes"
+.Fc
 .Sh DESCRIPTION
 These functions add an open, dup2 or close action to a spawn
 file actions object.