diff --git a/src/check-c-linkage-decls.sh b/src/check-c-linkage-decls.sh
index cd550867a..8234abc45 100755
--- a/src/check-c-linkage-decls.sh
+++ b/src/check-c-linkage-decls.sh
@@ -7,8 +7,7 @@ test -z "$srcdir" && srcdir=.
 stat=0
 
 test "x$HBHEADERS" = x && HBHEADERS=`cd "$srcdir"; find . -maxdepth 1 -name 'hb*.h'`
-test "x$HBSOURCES" = x && HBSOURCES=`cd "$srcdir"; find . -maxdepth 1 -name 'hb*.h'`
-
+test "x$HBSOURCES" = x && HBSOURCES=`cd "$srcdir"; find . -maxdepth 1 -name 'hb*.cc'`
 
 for x in $HBHEADERS; do
 	test -f "$srcdir/$x" -a ! -f "$x" && x="$srcdir/$x"