diff --git a/src/systemc/ext/systemc b/src/systemc/ext/systemc
index 1224a7e..e248550 100644
--- a/src/systemc/ext/systemc
+++ b/src/systemc/ext/systemc
@@ -30,6 +30,12 @@
 #ifndef __SYSTEMC_EXT_SYSTEMC__
 #define __SYSTEMC_EXT_SYSTEMC__
 
+// This include isn't supposed to be necessary, but some regression tests
+// assume that the sc_bind macro will work without explicitly including the
+// boost headers. This is in contradiction to the spec which says boost isn't
+// a required dependency.
+#include <boost/bind.hpp>
+
 #include "channel/_channel.hh"
 #include "core/_core.hh"
 #include "dt/_dt.hh"