diff --git a/common/JackAPI.cpp b/common/JackAPI.cpp
index 25c0d621..e86698ed 100644
--- a/common/JackAPI.cpp
+++ b/common/JackAPI.cpp
@@ -39,12 +39,12 @@ extern "C"
     typedef void (*print_function)(const char*);
     typedef void *(*thread_routine)(void*);
 
-    LIB_EXPORT const char* JACK_METADATA_PRETTY_NAME;
-    LIB_EXPORT const char* JACK_METADATA_HARDWARE;
-    LIB_EXPORT const char* JACK_METADATA_CONNECTED;
-    LIB_EXPORT const char* JACK_METADATA_PORT_GROUP;
-    LIB_EXPORT const char* JACK_METADATA_ICON_SMALL;
-    LIB_EXPORT const char* JACK_METADATA_ICON_LARGE;
+    LIB_EXPORT const char* JACK_METADATA_PRETTY_NAME = "http://jackaudio.org/metadata/pretty-name";
+    LIB_EXPORT const char* JACK_METADATA_HARDWARE = "http://jackaudio.org/metadata/hardware";
+    LIB_EXPORT const char* JACK_METADATA_CONNECTED = "http://jackaudio.org/metadata/connected";
+    LIB_EXPORT const char* JACK_METADATA_PORT_GROUP = "http://jackaudio.org/metadata/port-group";
+    LIB_EXPORT const char* JACK_METADATA_ICON_SMALL = "http://jackaudio.org/metadata/icon-small";
+    LIB_EXPORT const char* JACK_METADATA_ICON_LARGE = "http://jackaudio.org/metadata/icon-large";
 
     LIB_EXPORT
     void
@@ -2060,13 +2060,6 @@ LIB_EXPORT int jack_client_has_session_callback(jack_client_t* ext_client, const
     }
 }
 
-LIB_EXPORT const char* JACK_METADATA_PRETTY_NAME = "http://jackaudio.org/metadata/pretty-name";
-LIB_EXPORT const char* JACK_METADATA_HARDWARE = "http://jackaudio.org/metadata/hardware";
-LIB_EXPORT const char* JACK_METADATA_CONNECTED = "http://jackaudio.org/metadata/connected";
-LIB_EXPORT const char* JACK_METADATA_PORT_GROUP = "http://jackaudio.org/metadata/port-group";
-LIB_EXPORT const char* JACK_METADATA_ICON_SMALL = "http://jackaudio.org/metadata/icon-small";
-LIB_EXPORT const char* JACK_METADATA_ICON_LARGE = "http://jackaudio.org/metadata/icon-large";
-
 LIB_EXPORT int jack_set_property(jack_client_t*, jack_uuid_t, const char*, const char*, const char*)
 {
     return -1;