1 files changed, 2 insertions, 0 deletions

diff --git a/src/coding.c b/src/coding.c
index 1d838db3685..a161f5a34cd 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -3726,6 +3726,8 @@ decode_coding_iso_2022 (coding)
           continue;
 
         case ISO_single_shift_2_7:
+          if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS))
+            goto invalid_code;
         case ISO_single_shift_2:
           if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT))
             goto invalid_code;