diff --git a/src/strip_opcodes b/src/strip_opcodes
index 5c849832da40a19201c5f2b19a6d97d56b62ad47..de10a51406a27bf489d1ae891b39c6ecf8e1349f 100755
--- a/src/strip_opcodes
+++ b/src/strip_opcodes
@@ -3,8 +3,9 @@
 # Avoid clever UTF-8 assumptions.
 LANG=C
 LC_CTYPE=C
+LC_ALL=C
 
-export LANG LC_CTYPE
+export LANG LC_CTYPE LC_ALL
 
 # Notes about limitations in SysV sed:
 #