diff --git a/libopenjpeg/opj_inttypes.h b/libopenjpeg/opj_inttypes.h
index 09a7a067..d6a29263 100644
--- a/libopenjpeg/opj_inttypes.h
+++ b/libopenjpeg/opj_inttypes.h
@@ -31,6 +31,7 @@
 #include <inttypes.h>
 #else
 #if defined(_WIN32)
+#define PRId64 "I64d"
 #define PRIi64 "I64i"
 #define PRIu64 "I64u"
 #define PRIx64 "I64x"