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-rw-r--r--src/ccl.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/ccl.h b/src/ccl.h
index e86154352a3..f55b295027e 100644
--- a/src/ccl.h
+++ b/src/ccl.h
@@ -37,7 +37,7 @@ along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
/* Structure to hold information about running CCL code. Read
comments in the file ccl.c for the detail of each field. */
struct ccl_program {
- int idx; /* Index number of the CCL program.
+ ptrdiff_t idx; /* Index number of the CCL program.
-1 means that the program was given
by a vector, not by a program
name. */