diff --git a/src/Makefile.am b/src/Makefile.am
index effb6bc..8180225 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -329,6 +329,7 @@
 
 dist_check_SCRIPTS = \
 	check-c-linkage-decls.sh \
+	check-defs.sh \
 	check-header-guards.sh \
 	check-includes.sh \
 	check-libstdc++.sh \
diff --git a/src/check-defs.sh b/src/check-defs.sh
new file mode 100755
index 0000000..d7a8ec2
--- /dev/null
+++ b/src/check-defs.sh
@@ -0,0 +1,44 @@
+#!/bin/sh
+
+LC_ALL=C
+export LC_ALL
+
+test -z "$srcdir" && srcdir=.
+test -z "$MAKE" && MAKE=make
+stat=0
+
+if which nm 2>/dev/null >/dev/null; then
+	:
+else
+	echo "check-defs.sh: 'nm' not found; skipping test"
+	exit 77
+fi
+
+defs="harfbuzz.def"
+$MAKE $defs > /dev/null
+tested=false
+for def in $defs; do
+	lib=`echo "$def" | sed 's/[.]def$//;s@.*/@@'`
+	so=.libs/lib${lib}.so
+
+	EXPORTED_SYMBOLS="`nm "$so" | grep ' [BCDGINRSTVW] ' | grep -v ' _fini\>\| _init\>\| _fdata\>\| _ftext\>\| __bss_start\>\| __bss_start__\>\| __bss_end__\>\| _edata\>\| _end\>\| _bss_end__\>\| __end__\>' | cut -d' ' -f3`"
+
+	if test -f "$so"; then
+
+		echo "Checking that $so has the same symbol list as $def"
+		{
+			echo EXPORTS
+			echo "$EXPORTED_SYMBOLS"
+			# cheat: copy the last line from the def file!
+			tail -n1 "$def"
+		} | diff "$def" - >&2 || stat=1
+
+		tested=true
+	fi
+done
+if ! $tested; then
+	echo "check-defs.sh: libharfbuzz shared library not found; skipping test"
+	exit 77
+fi
+
+exit $stat
diff --git a/src/check-symbols.sh b/src/check-symbols.sh
index 73bfc9e..67bdf71 100755
--- a/src/check-symbols.sh
+++ b/src/check-symbols.sh
@@ -4,9 +4,9 @@
 export LC_ALL
 
 test -z "$srcdir" && srcdir=.
-test -z "$MAKE" && MAKE=make
 stat=0
 
+
 if which nm 2>/dev/null >/dev/null; then
 	:
 else
@@ -14,36 +14,23 @@
 	exit 77
 fi
 
-defs="harfbuzz.def"
-$MAKE $defs > /dev/null
+echo "Checking that we are not exposing internal symbols"
 tested=false
-for def in $defs; do
-	lib=`echo "$def" | sed 's/[.]def$//;s@.*/@@'`
-	so=.libs/lib${lib}.so
-
+for so in `ls .libs/lib*.so .libs/lib*.dylib 2>/dev/null` ; do
+	
 	EXPORTED_SYMBOLS="`nm "$so" | grep ' [BCDGINRSTVW] ' | grep -v ' _fini\>\| _init\>\| _fdata\>\| _ftext\>\| __bss_start\>\| __bss_start__\>\| __bss_end__\>\| _edata\>\| _end\>\| _bss_end__\>\| __end__\>' | cut -d' ' -f3`"
+	prefix=`basename "$so" | sed 's/libharfbuzz/hb/; s/-/_/g; s/[.].*//'`
 
-	if test -f "$so"; then
-
-		echo "Checking that $so has the same symbol list as $def"
-		{
-			echo EXPORTS
-			echo "$EXPORTED_SYMBOLS"
-			# cheat: copy the last line from the def file!
-			tail -n1 "$def"
-		} | diff "$def" - >&2 || stat=1
-
-		echo "Checking that we are not exposing internal symbols"
-		if echo "$EXPORTED_SYMBOLS" | grep -v 'hb_'; then
-			echo "Ouch, internal symbols exposed"
-			stat=1
-		fi
-
-		tested=true
+	echo "Processing $so"
+	if echo "$EXPORTED_SYMBOLS" | grep -v "^${prefix}_"; then
+		echo "Ouch, internal symbols exposed"
+		stat=1
 	fi
+
+	tested=true
 done
 if ! $tested; then
-	echo "check-exported-symbols.sh: libharfbuzz shared library not found; skipping test"
+	echo "check-symbols.sh: no shared library found; skipping test"
 	exit 77
 fi