diff --git a/src/rig.c b/src/rig.c
index 1dd72239b..1778e1fbe 100644
--- a/src/rig.c
+++ b/src/rig.c
@@ -89,7 +89,12 @@
 const char *hamlib_license = "LGPL";
 //! @cond Doxygen_Suppress
 const char hamlib_version[21] = "Hamlib " PACKAGE_VERSION;
-const char *hamlib_version2 = "Hamlib " PACKAGE_VERSION " " HAMLIBDATETIME;
+#if INTPTR_MAX == INT64_MAX
+#define ARCHBITS "64-bit"
+#else
+#define ARCHBITS "32-bit"
+#endif
+const char *hamlib_version2 = "Hamlib " PACKAGE_VERSION " " HAMLIBDATETIME " " ARCHBITS;
 HAMLIB_EXPORT_VAR(int) cookie_use;
 HAMLIB_EXPORT_VAR(int) lock_mode; // for use by rigctld
 HAMLIB_EXPORT_VAR(powerstat_t) rig_powerstat; // for use by rigctld