diff --git a/cddl/contrib/opensolaris/cmd/sgs/tools/common/findprime.c b/cddl/contrib/opensolaris/cmd/sgs/tools/common/findprime.c
index 87d88c0b930a..299fa21362c7 100644
--- a/cddl/contrib/opensolaris/cmd/sgs/tools/common/findprime.c
+++ b/cddl/contrib/opensolaris/cmd/sgs/tools/common/findprime.c
@@ -27,6 +27,7 @@
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 
 #include <sys/types.h>
+#include <sgs.h>
 
 /*
  * function that will find a prime'ish number.  Usefull for