diff --git a/histmem.c b/histmem.c
index 6f492749..f1888e00 100644
--- a/histmem.c
+++ b/histmem.c
@@ -60,7 +60,6 @@
 #include "HistDriv.i"
 #include "HistMem.i"
 #include "histsim.h"
-#include "psi/hardsup/sinqhm.h"
 #include "dynstring.h"
 #include "event.h"
 #include "status.h"