https://bugs.gentoo.org/944783
--- a/otr-plugin.c
+++ b/otr-plugin.c
@@ -33,12 +33,12 @@
 #include <gcrypt.h>
 
 /* purple headers */
-#include "pidgin.h"
-#include "notify.h"
-#include "version.h"
-#include "util.h"
-#include "debug.h"
-#include "core.h"
+#include "pidgin/pidgin.h"
+#include "libpurple/notify.h"
+#include "libpurple/version.h"
+#include "libpurple/util.h"
+#include "libpurple/debug.h"
+#include "libpurple/core.h"
 
 #ifdef USING_GTK
 /* purple GTK headers */