--- Modules/CMakeFortranCompilerId.F.in.orig	2021-02-24 15:08:43 UTC
+++ Modules/CMakeFortranCompilerId.F.in
@@ -125,6 +125,8 @@
         PRINT *, 'INFO:platform[Darwin]'
 #elif defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
         PRINT *, 'INFO:platform[Windows]'
+#elif defined(__BSDSUniX__) || defined(__BSDSUniX)
+        PRINT *, 'INFO:platform[BSDSUniX]'
 #elif defined(__FreeBSD__) || defined(__FreeBSD)
         PRINT *, 'INFO:platform[FreeBSD]'
 #elif defined(__NetBSD__) || defined(__NetBSD)