diff --git a/src/tools/jam/Jambase b/src/tools/jam/Jambase
index 9e0726b377..1ed3bf4e90 100644
--- a/src/tools/jam/Jambase
+++ b/src/tools/jam/Jambase
@@ -1498,7 +1498,7 @@ rule Yacc
 {
 	local _h ;
 
-	_h = [ FGristFiles $(<:BS=.h) ] ;
+	_h = $(<:S=.h) ;
 
 	# Some places don't have a yacc.
 
diff --git a/src/tools/jam/jambase.c b/src/tools/jam/jambase.c
index 6c5001e6d9..a2921e77f2 100644
--- a/src/tools/jam/jambase.c
+++ b/src/tools/jam/jambase.c
@@ -848,7 +848,7 @@ const char *jambase[] = {
 "rule Yacc\n",
 "{\n",
 "local _h ;\n",
-"_h = $(<:BS=.h) ;\n",
+"_h = $(<:S=.h) ;\n",
 "MakeLocate $(<) $(_h) : $(LOCATE_SOURCE) ;\n",
 "if $(YACC)\n",
 "{\n",