bpo-39943: Add the const qualifier to pointers on non-mutable PyUnicode data. (GH-19345)
diff --git a/Modules/cjkcodecs/cjkcodecs.h b/Modules/cjkcodecs/cjkcodecs.h
index 8f6f880..e41755b 100644
--- a/Modules/cjkcodecs/cjkcodecs.h
+++ b/Modules/cjkcodecs/cjkcodecs.h
@@ -72,7 +72,7 @@
#define ENCODER(encoding) \
static Py_ssize_t encoding##_encode( \
MultibyteCodec_State *state, const void *config, \
- int kind, void *data, \
+ int kind, const void *data, \
Py_ssize_t *inpos, Py_ssize_t inlen, \
unsigned char **outbuf, Py_ssize_t outleft, int flags)
#define ENCODER_RESET(encoding) \