diff --git a/src/check-libstdc++.sh b/src/check-libstdc++.sh
index e7e0e295e..27deb42dc 100755
--- a/src/check-libstdc++.sh
+++ b/src/check-libstdc++.sh
@@ -17,14 +17,14 @@ fi
 tested=false
 for suffix in so dylib; do
 	so=.libs/libharfbuzz.$suffix
-	if test -f "$so"; then
-		echo "Checking that we are not linking to libstdc++"
-		if ldd $so | grep 'libstdc[+][+]'; then
-			echo "Ouch, linked to libstdc++"
-			stat=1
-		fi
-		tested=true
+	if ! test -f "$so"; then continue; fi
+
+	echo "Checking that we are not linking to libstdc++"
+	if ldd $so | grep 'libstdc[+][+]'; then
+		echo "Ouch, linked to libstdc++"
+		stat=1
 	fi
+	tested=true
 done
 if ! $tested; then
 	echo "check-libstdc++.sh: libharfbuzz shared library not found; skipping test"
diff --git a/src/check-symbols.sh b/src/check-symbols.sh
index e000b01b8..91eefd4e4 100755
--- a/src/check-symbols.sh
+++ b/src/check-symbols.sh
@@ -16,11 +16,17 @@ fi
 
 echo "Checking that we are not exposing internal symbols"
 tested=false
-for so in `ls .libs/lib*.so .libs/lib*.dylib 2>/dev/null` ; do
+for suffix in so dylib; do
+	so=.libs/libharfbuzz.$suffix
+	if ! test -f "$so"; then continue; fi
+	prefix=
 	
 	EXPORTED_SYMBOLS="`nm "$so" | grep ' [BCDGINRSTVW] ' | grep -v ' _fini\>\| _init\>\| _fdata\>\| _ftext\>\| _fbss\>\| __bss_start\>\| __bss_start__\>\| __bss_end__\>\| _edata\>\| _end\>\| _bss_end__\>\| __end__\>' | cut -d' ' -f3`"
 	prefix=`basename "$so" | sed 's/libharfbuzz/hb/; s/-/_/g; s/[.].*//'`
 
+	# Ob mac, C symbols are prefixed with _
+	if test $suffix = dylib; then prefix="_$prefix"; fi
+
 	echo "Processing $so"
 	if echo "$EXPORTED_SYMBOLS" | grep -v "^${prefix}_"; then
 		echo "Ouch, internal symbols exposed"