diff --git a/src/serial.h b/src/serial.h
index 1f84dcc..0962f4e 100644
--- a/src/serial.h
+++ b/src/serial.h
@@ -55,6 +55,10 @@ typedef enum serial_line_t {
 	SERIAL_LINE_RNG, // Ring indicator
 } serial_line_t;
 
+typedef void (*serial_callback_t) (const char *name, void *userdata);
+
+int serial_enumerate (serial_callback_t callback, void *userdata);
+
 int serial_open (serial_t **device, dc_context_t *context, const char* name);
 
 int serial_close (serial_t *device);
diff --git a/src/serial_posix.c b/src/serial_posix.c
index 801b10c..f4cfa14 100644
--- a/src/serial_posix.c
+++ b/src/serial_posix.c
@@ -38,6 +38,10 @@
 #ifdef HAVE_IOKIT_SERIAL_IOSS_H
 #include <IOKit/serial/ioss.h>
 #endif
+#include <stdio.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <fnmatch.h>
 
 #ifndef TIOCINQ
 #define TIOCINQ FIONREAD
@@ -72,6 +76,52 @@ struct serial_t {
 	unsigned int nbits;
 };
 
+
+int
+serial_enumerate (serial_callback_t callback, void *userdata)
+{
+	DIR *dp = NULL;
+	struct dirent *ep = NULL;
+	const char *dirname = "/dev";
+	const char *patterns[] = {
+#if defined (__APPLE__)
+		"tty.*",
+#else
+		"ttyS*",
+		"ttyUSB*",
+		"ttyACM*",
+		"rfcomm*",
+#endif
+		NULL
+	};
+
+	dp = opendir (dirname);
+	if (dp == NULL) {
+		return -1;
+	}
+
+	while ((ep = readdir (dp)) != NULL) {
+		for (size_t i = 0; patterns[i] != NULL; ++i) {
+			if (fnmatch (patterns[i], ep->d_name, 0) == 0) {
+				char filename[1024];
+				int n = snprintf (filename, sizeof (filename), "%s/%s", dirname, ep->d_name);
+				if (n >= sizeof (filename)) {
+					closedir (dp);
+					return -1;
+				}
+
+				callback (filename, userdata);
+				break;
+			}
+		}
+	}
+
+	closedir (dp);
+
+	return 0;
+}
+
+
 //
 // Open the serial port.
 //
diff --git a/src/serial_win32.c b/src/serial_win32.c
index fa4d00a..62cf486 100644
--- a/src/serial_win32.c
+++ b/src/serial_win32.c
@@ -47,6 +47,60 @@ struct serial_t {
 	unsigned int nbits;
 };
 
+int
+serial_enumerate (serial_callback_t callback, void *userdata)
+{
+	// Open the registry key.
+	HKEY hKey;
+	LONG rc = RegOpenKeyEx (HKEY_LOCAL_MACHINE, "HARDWARE\\DEVICEMAP\\SERIALCOMM", 0, KEY_QUERY_VALUE, &hKey);
+	if (rc != ERROR_SUCCESS) {
+		if (rc == ERROR_FILE_NOT_FOUND)
+			return 0;
+		else
+			return -1;
+	}
+
+	// Get the number of values.
+	DWORD count = 0;
+	rc = RegQueryInfoKey (hKey, NULL, NULL, NULL, NULL, NULL, NULL, &count, NULL, NULL, NULL, NULL);
+	if (rc != ERROR_SUCCESS) {
+		RegCloseKey(hKey);
+		return -1;
+	}
+
+	for (DWORD i = 0; i < count; ++i) {
+		// Get the value name, data and type.
+		char name[512], data[512];
+		DWORD name_len = sizeof (name);
+		DWORD data_len = sizeof (data);
+		DWORD type = 0;
+		rc = RegEnumValue (hKey, i, name, &name_len, NULL, &type, (LPBYTE) data, &data_len);
+		if (rc != ERROR_SUCCESS) {
+			RegCloseKey(hKey);
+			return -1;
+		}
+
+		// Ignore non-string values.
+		if (type != REG_SZ)
+			continue;
+
+		// Prevent a possible buffer overflow.
+		if (data_len >= sizeof (data)) {
+			RegCloseKey(hKey);
+			return -1;
+		}
+
+		// Null terminate the string.
+		data[data_len] = 0;
+
+		callback (data, userdata);
+	}
+
+	RegCloseKey(hKey);
+
+	return 0;
+}
+
 //
 // Open the serial port.
 //