diff --git a/include/bits/sys/select.h b/include/bits/sys/select.h
deleted file mode 100644
index 843e1a0745..0000000000
--- a/include/bits/sys/select.h
+++ /dev/null
@@ -1,23 +0,0 @@
-#ifndef _BITS_SYS_SELECT_H
-#define _BITS_SYS_SELECT_H
-
-// from musl license MIT {
-#define FD_SETSIZE 1024
-
-typedef unsigned long fd_mask;
-
-typedef struct {
-	unsigned long fds_bits[FD_SETSIZE / 8 / sizeof(long)];
-} fd_set;
-
-#define FD_ZERO(s) do { int __i; unsigned long *__b=(s)->fds_bits; for(__i=sizeof (fd_set)/sizeof (long); __i; __i--) *__b++=0; } while(0)
-#define FD_SET(d, s)   ((s)->fds_bits[(d)/(8*sizeof(long))] |= (1UL<<((d)%(8*sizeof(long)))))
-#define FD_CLR(d, s)   ((s)->fds_bits[(d)/(8*sizeof(long))] &= ~(1UL<<((d)%(8*sizeof(long)))))
-#define FD_ISSET(d, s) !!((s)->fds_bits[(d)/(8*sizeof(long))] & (1UL<<((d)%(8*sizeof(long)))))
-
-#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define NFDBITS (8*(int)sizeof(long))
-#endif
-// } from musl license MIT
-
-#endif
diff --git a/src/header/sys_select/cbindgen.toml b/src/header/sys_select/cbindgen.toml
index 61a50a0595..36bfa1fcab 100644
--- a/src/header/sys_select/cbindgen.toml
+++ b/src/header/sys_select/cbindgen.toml
@@ -1,4 +1,24 @@
-sys_includes = ["bits/sys/select.h", "time.h", "signal.h"]
+sys_includes = ["time.h", "signal.h"]
+after_includes = """
+// from musl license MIT {
+#define FD_SETSIZE 1024
+
+typedef unsigned long fd_mask;
+
+typedef struct {
+    unsigned long fds_bits[FD_SETSIZE / 8 / sizeof(long)];
+} fd_set;
+
+#define FD_ZERO(s) do { int __i; unsigned long *__b=(s)->fds_bits; for(__i=sizeof (fd_set)/sizeof (long); __i; __i--) *__b++=0; } while(0)
+#define FD_SET(d, s)   ((s)->fds_bits[(d)/(8*sizeof(long))] |= (1UL<<((d)%(8*sizeof(long)))))
+#define FD_CLR(d, s)   ((s)->fds_bits[(d)/(8*sizeof(long))] &= ~(1UL<<((d)%(8*sizeof(long)))))
+#define FD_ISSET(d, s) !!((s)->fds_bits[(d)/(8*sizeof(long))] & (1UL<<((d)%(8*sizeof(long)))))
+
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#define NFDBITS (8*(int)sizeof(long))
+#endif
+// } from musl license MIT
+"""
 include_guard = "_SYS_SELECT_H"
 language = "C"
 style = "Tag"
@@ -9,5 +29,5 @@ cpp_compat = true
 prefix_with_name = true
 
 [export]
-# fd_set is also defined in C because cbindgen is incompatible with mem::size_of booo
+# fd_set is also defined in C (above) because cbindgen is incompatible with mem::size_of
 exclude = ["FD_SETSIZE", "fd_set"]