diff --git a/c_lib/wasi_ext_lib.c b/c_lib/wasi_ext_lib.c
index 416bef2..392ff46 100644
--- a/c_lib/wasi_ext_lib.c
+++ b/c_lib/wasi_ext_lib.c
@@ -19,6 +19,17 @@
 #define SYSCALL_LENGTH 256
 #define SYSCALL_ARGS_LENGTH 2048
 
+const __wasi_fdflags_t WASI_EXT_FDFLAG_CTRL_BIT = 0x0020;
+const __wasi_fdflags_t WASI_EXT_FDFLAG_MASK = 0xffc0;
+const __wasi_fdflags_t WASI_EXT_FDFLAG_CLOEXEC = 0x0040;
+
+const unsigned int TIOCGWINSZ = _IOR(1, 0, 8);
+const unsigned int TIOCSRAW = _IOW(1, 1, 4);
+const unsigned int TIOCSECHO = _IOW(1, 2, 4);
+
+const int STDIN = 0;
+const int STDOUT = 1;
+
 int __syscall(const char *command, char *args, uint8_t *output_buf,
               size_t output_buf_len) {
     char *ptr;
diff --git a/c_lib/wasi_ext_lib.h b/c_lib/wasi_ext_lib.h
index 5bf054f..b36b8e7 100644
--- a/c_lib/wasi_ext_lib.h
+++ b/c_lib/wasi_ext_lib.h
@@ -40,20 +40,20 @@
 #include <stdlib.h>
 
 // Ioctl magic numbers
-const unsigned int TIOCGWINSZ = _IOR(1, 0, 8);
-const unsigned int TIOCSRAW = _IOW(1, 1, 4);
-const unsigned int TIOCSECHO = _IOW(1, 2, 4);
+extern const unsigned int TIOCGWINSZ;
+extern const unsigned int TIOCSRAW;
+extern const unsigned int TIOCSECHO;
 
 // Fnctl commands
 enum FcntlCommand { F_MVFD, F_GETFD, F_SETFD };
 
 // Extended fs_fdflags
-const __wasi_fdflags_t WASI_EXT_FDFLAG_CTRL_BIT = 0x0020;
-const __wasi_fdflags_t WASI_EXT_FDFLAG_MASK = 0xffc0;
-const __wasi_fdflags_t WASI_EXT_FDFLAG_CLOEXEC = 0x0040;
+extern const __wasi_fdflags_t WASI_EXT_FDFLAG_CTRL_BIT;
+extern const __wasi_fdflags_t WASI_EXT_FDFLAG_MASK;
+extern const __wasi_fdflags_t WASI_EXT_FDFLAG_CLOEXEC;
 
-const int STDIN = 0;
-const int STDOUT = 1;
+extern const int STDIN;
+extern const int STDOUT;
 
 enum RedirectType {
     READ,