diff --git a/examples/debug-trans-socket/duk_trans_socket.h b/examples/debug-trans-socket/duk_trans_socket.h
index 281ddc81f7..f4f03a01cb 100644
--- a/examples/debug-trans-socket/duk_trans_socket.h
+++ b/examples/debug-trans-socket/duk_trans_socket.h
@@ -3,13 +3,21 @@
 
 #include "duktape.h"
 
-void duk_trans_socket_init(void);
-void duk_trans_socket_finish(void);
-void duk_trans_socket_waitconn(void);
-duk_size_t duk_trans_socket_read_cb(void *udata, char *buffer, duk_size_t length);
-duk_size_t duk_trans_socket_write_cb(void *udata, const char *buffer, duk_size_t length);
-duk_size_t duk_trans_socket_peek_cb(void *udata);
-void duk_trans_socket_read_flush_cb(void *udata);
-void duk_trans_socket_write_flush_cb(void *udata);
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+DUK_EXTERNAL_DECL void duk_trans_socket_init(void);
+DUK_EXTERNAL_DECL void duk_trans_socket_finish(void);
+DUK_EXTERNAL_DECL void duk_trans_socket_waitconn(void);
+DUK_EXTERNAL_DECL duk_size_t duk_trans_socket_read_cb(void *udata, char *buffer, duk_size_t length);
+DUK_EXTERNAL_DECL duk_size_t duk_trans_socket_write_cb(void *udata, const char *buffer, duk_size_t length);
+DUK_EXTERNAL_DECL duk_size_t duk_trans_socket_peek_cb(void *udata);
+DUK_EXTERNAL_DECL void duk_trans_socket_read_flush_cb(void *udata);
+DUK_EXTERNAL_DECL void duk_trans_socket_write_flush_cb(void *udata);
+
+#if defined(__cplusplus)
+}
+#endif  /* end 'extern "C"' wrapper */
 
 #endif  /* DUK_TRANS_SOCKET_H_INCLUDED */
diff --git a/examples/debug-trans-socket/duk_trans_socket_unix.c b/examples/debug-trans-socket/duk_trans_socket_unix.c
index 0633eff215..9eac5d4c67 100644
--- a/examples/debug-trans-socket/duk_trans_socket_unix.c
+++ b/examples/debug-trans-socket/duk_trans_socket_unix.c
@@ -9,6 +9,8 @@
  *  defining USE_SELECT.  See https://daniel.haxx.se/docs/poll-vs-select.html.
  */
 
+#define DUK_COMPILING_DUKTAPE
+
 #include <stdio.h>
 #include <string.h>
 #include <sys/socket.h>
diff --git a/examples/debug-trans-socket/duk_trans_socket_windows.c b/examples/debug-trans-socket/duk_trans_socket_windows.c
index 59bee04d06..e0b1226d77 100644
--- a/examples/debug-trans-socket/duk_trans_socket_windows.c
+++ b/examples/debug-trans-socket/duk_trans_socket_windows.c
@@ -31,6 +31,8 @@
  *          prep/duktape.c -lm -lws2_32
  */
 
+#define DUK_COMPILING_DUKTAPE
+
 #undef UNICODE
 #if !defined(WIN32_LEAN_AND_MEAN)
 #define WIN32_LEAN_AND_MEAN
diff --git a/extras/module-node/duk_module_node.c b/extras/module-node/duk_module_node.c
index 9dd48bf53d..01eb08b05e 100644
--- a/extras/module-node/duk_module_node.c
+++ b/extras/module-node/duk_module_node.c
@@ -4,6 +4,8 @@
  *  https://nodejs.org/api/modules.html
  */
 
+#define DUK_COMPILING_DUKTAPE
+
 #include "duktape.h"
 #include "duk_module_node.h"
 
diff --git a/extras/module-node/duk_module_node.h b/extras/module-node/duk_module_node.h
index 12772bf67b..7179926e5d 100644
--- a/extras/module-node/duk_module_node.h
+++ b/extras/module-node/duk_module_node.h
@@ -7,8 +7,8 @@
 extern "C" {
 #endif
 
-extern duk_ret_t duk_module_node_peval_main(duk_context *ctx, const char *path);
-extern void duk_module_node_init(duk_context *ctx);
+DUK_EXTERNAL_DECL duk_ret_t duk_module_node_peval_main(duk_context *ctx, const char *path);
+DUK_EXTERNAL_DECL void duk_module_node_init(duk_context *ctx);
 
 #if defined(__cplusplus)
 }