diff --git a/acb_poly/lgamma_series.c b/acb_poly/lgamma_series.c
index 504b0cb4..d50ffb9f 100644
--- a/acb_poly/lgamma_series.c
+++ b/acb_poly/lgamma_series.c
@@ -10,6 +10,7 @@
 */
 
 #include "acb_poly.h"
+#include "acb_hypgeom.h"
 
 void
 _acb_log_rising_correct_branch(acb_t t,