diff --git a/src/polyp/thread-mainloop.c b/src/polyp/thread-mainloop.c
index 6c14a1d31..577e0c2f6 100644
--- a/src/polyp/thread-mainloop.c
+++ b/src/polyp/thread-mainloop.c
@@ -37,6 +37,7 @@
 #include <pthread.h>
 #endif
 
+#include <polypcore/log.h>
 #include <polypcore/xmalloc.h>
 
 #include "mainloop.h"