diff --git a/wscript b/wscript
index 9930c492..a15d2c51 100644
--- a/wscript
+++ b/wscript
@@ -523,7 +523,7 @@ def configure(conf):
 
 	if conf.env.DEST_CPU in ['x86', 'x86_64']:
 		flags += ['-mfpmath=sse']
-	elif conf.env.DEST_CPU in ['arm', 'aarch64']:
+	elif conf.env.DEST_CPU in ['arm', 'aarch64', 'thumb' ]:
 		flags += ['-fsigned-char']
 
 	if conf.env.DEST_CPU in [ 'arm', 'thumb' ]: