1 files changed, 2 insertions, 2 deletions

diff --git a/src/coding.c b/src/coding.c
index 32d1c64afbe..a5632bad963 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -4097,8 +4097,8 @@ decode_coding_iso_2022 (struct coding_system *coding)
 #define ENCODE_DESIGNATION(charset, reg, coding)                        \
   do {                                                                  \
     unsigned char final_char = CHARSET_ISO_FINAL (charset);             \
-    char *intermediate_char_94 = "()*+";                                \
-    char *intermediate_char_96 = ",-./";                                \
+    const char *intermediate_char_94 = "()*+";                          \
+    const char *intermediate_char_96 = ",-./";                          \
     int revision = -1;                                                  \
     int c;                                                              \
                                                                         \