--- a/src/libreal/real_common.h
+++ b/src/libreal/real_common.h
@@ -75,10 +75,10 @@
 			 const char *const codec_name,
 			 const char *const codec_alternate);
 
-const decoder_info_t dec_info_realvideo;
+extern const decoder_info_t dec_info_realvideo;
 void *init_realvdec (xine_t *xine, const void *data);
 
-const decoder_info_t dec_info_realaudio;
+extern const decoder_info_t dec_info_realaudio;
 void *init_realadec (xine_t *xine, const void *data);
 
 #endif