1 files changed, 4 insertions, 0 deletions

diff --git a/src/regex.c b/src/regex.c
index 2a260376833..e4422ce9383 100644
--- a/src/regex.c
+++ b/src/regex.c
@@ -27,11 +27,15 @@
 #undef  _GNU_SOURCE
 #define _GNU_SOURCE
 
+#ifdef emacs
 /* Converts the pointer to the char to BEG-based offset from the start.  */
 #define PTR_TO_OFFSET(d)                                                \
         POS_AS_IN_BUFFER (MATCHING_IN_FIRST_STRING                      \
                           ? (d) - string1 : (d) - (string2 - size1))
 #define POS_AS_IN_BUFFER(p) ((p) + (NILP (re_match_object) || BUFFERP (re_match_object)))
+#else
+#define PTR_TO_OFFSET(d) 0
+#endif
 
 #ifdef HAVE_CONFIG_H
 #include <config.h>