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-rw-r--r--Build/source/texk/dvipdfm-x/pdffont.c7
-rw-r--r--Build/source/texk/dvipdfm-x/pdfobj.h2
2 files changed, 4 insertions, 5 deletions
diff --git a/Build/source/texk/dvipdfm-x/pdffont.c b/Build/source/texk/dvipdfm-x/pdffont.c
index 3ac790c8fe0..7c8caca3886 100644
--- a/Build/source/texk/dvipdfm-x/pdffont.c
+++ b/Build/source/texk/dvipdfm-x/pdffont.c
@@ -90,10 +90,9 @@ pdf_font_set_dpi (int font_dpi)
/* If an environment variable SOURCE_DATE_EPOCH is correctly defined like
* SOURCE_DATE_EPOCH=1456304492, then returns this value, to be used as the
- * 'current time', otherwise returns INVALID_EPOCH_VALUE (= 0xfffffffffULL).
- * Here we follow the limit in Microsoft Visual Studio 2010, that is,
- * the value should be less than 32535291600, so we define 0xfffffffffULL
- * as INVALID_EPOCH_VALUE.
+ * 'current time', otherwise returns INVALID_EPOCH_VALUE (= 0x7fffffffffffffffULL).
+ * In the case of Microsoft Visual Studio 2010, the value should be less
+ * than 32535291600.
*/
time_t
diff --git a/Build/source/texk/dvipdfm-x/pdfobj.h b/Build/source/texk/dvipdfm-x/pdfobj.h
index 7485c68d17a..83f45a6aa71 100644
--- a/Build/source/texk/dvipdfm-x/pdfobj.h
+++ b/Build/source/texk/dvipdfm-x/pdfobj.h
@@ -199,6 +199,6 @@ extern int pdfobj_escape_str (char *buffer, int size, const unsigned char *
extern pdf_obj *pdf_new_indirect (pdf_file *pf, unsigned label, unsigned short generation);
extern time_t get_unique_time_if_given(void);
-#define INVALID_EPOCH_VALUE 0xfffffffffULL
+#define INVALID_EPOCH_VALUE 0x7fffffffffffffffULL
#endif /* _PDFOBJ_H_ */