diff --git a/third_party/freetype/roll-freetype.sh b/third_party/freetype/roll-freetype.sh
index 74fd660..40e1f10 100755
--- a/third_party/freetype/roll-freetype.sh
+++ b/third_party/freetype/roll-freetype.sh
@@ -19,11 +19,11 @@
 cp third_party/freetype/src/src/psnames/pstables.h \
   third_party/freetype/include/pstables.h
 
-sed -i "s/^Version: .*\$/Version: ${FT_VERSION%-*}/" \
+sed -i '' -e "s/^Version: .*\$/Version: ${FT_VERSION%-*}/" \
   third_party/freetype/README.pdfium
-sed -i "s/^Revision: .*\$/Revision: ${FT_COMMIT}/" \
+sed -i '' -e "s/^Revision: .*\$/Revision: ${FT_COMMIT}/" \
   third_party/freetype/README.pdfium
-sed -i'' -e "s@^CPEPrefix: cpe:/a:freetype:freetype:.*\$@CPEPrefix: cpe:/a:freetype:freetype:${FT_CPE_VERSION}@" \
+sed -i '' -e "s@^CPEPrefix: cpe:/a:freetype:freetype:.*\$@CPEPrefix: cpe:/a:freetype:freetype:${FT_CPE_VERSION}@" \
   third_party/freetype/README.pdfium
 
 git add third_party/freetype/README.pdfium