diff --git a/include/bits/stdio.h b/include/bits/stdio.h
index 0c14171ce4..63957176c8 100644
--- a/include/bits/stdio.h
+++ b/include/bits/stdio.h
@@ -9,5 +9,9 @@ typedef struct FILE FILE;
 // A typedef doesn't suffice, because libgmp uses this definition to check if
 // STDIO was loaded.
 #define FILE FILE
+// Likewise, stdin, stdout, and stderr are expected to be macros.
+#define stdin stdin
+#define stdout stdout
+#define stderr stderr
 
 #endif /* _BITS_STDIO_H */
diff --git a/src/header/regex/mod.rs b/src/header/regex/mod.rs
index e73ecb4830..2aa348c27b 100644
--- a/src/header/regex/mod.rs
+++ b/src/header/regex/mod.rs
@@ -35,6 +35,7 @@ pub const REG_NOSUB: c_int = 4;
 pub const REG_NEWLINE: c_int = 8;
 pub const REG_NOTBOL: c_int = 16;
 pub const REG_NOTEOL: c_int = 32;
+pub const REG_MINIMAL: c_int = 64;
 
 pub const REG_NOMATCH: c_int = 1;
 pub const REG_BADPAT: c_int = 2;