diff --git a/srcpkgs/opentoonz/patches/invalid-char.patch b/srcpkgs/opentoonz/patches/invalid-char.patch
new file mode 100644
index 00000000000..a2d6b684419
--- /dev/null
+++ b/srcpkgs/opentoonz/patches/invalid-char.patch
@@ -0,0 +1,10 @@
+--- toonz/sources/common/twain/twain.h.orig	2021-01-22 18:20:20.834440241 +0700
++++ toonz/sources/common/twain/twain.h	2021-01-22 18:20:28.671469813 +0700
+@@ -2209,7 +2209,6 @@
+ #elif defined(TWH_CMP_GNU)
+ #pragma pack(pop, before_twain)
+ #elif defined(TWH_CMP_BORLAND)
+-#pragma option –a.
+ #elif defined(TWH_CMP_XCODE)
+ #if PRAGMA_STRUCT_ALIGN
+ #pragma options align = reset