diff -r 1748c5d94fe2 -r 9f4b672bd85c configure.ac
--- a/configure.ac	Wed Apr 25 11:46:40 2018 +0100
+++ b/configure.ac	Tue Jun 05 17:21:56 2018 +0100
@@ -34,24 +34,14 @@
 ])
 AM_INIT_AUTOMAKE(no-define parallel-tests)
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
-case $VERSION in
-  *.*.*)
-    AC_SUBST(PLOVER_MAJOR_VERSION,[[`echo $VERSION | sed 's/\..*//'`]])
-    AC_SUBST(PLOVER_MINOR_VERSION,
-      [[`echo $VERSION | sed 's/[^.]*\.\([^.]*\)\..*/\1/'`]])
-    AC_SUBST(PLOVER_MICRO_VERSION,[[`echo $VERSION | sed 's/.*\.\([^.]*\)/\1/'`]])      ;;
-  *.*)
-    AC_SUBST(PLOVER_MAJOR_VERSION,[[`echo $VERSION | sed 's/\..*//'`]])
-    AC_SUBST(PLOVER_MINOR_VERSION,
-      [[`echo $VERSION | sed 's/[^.]*\.\([^.]*\)/\1/'`]])
-    AC_SUBST(PLOVER_MICRO_VERSION,0)
-    ;;
-  *)
-    AC_SUBST(PLOVER_MAJOR_VERSION,0)
-    AC_SUBST(PLOVER_MINOR_VERSION,0)
-    AC_SUBST(PLOVER_MICRO_VERSION,0)
-    ;;
-esac
+AC_SUBST(PLOVER_MAJOR_VERSION,[[`echo $VERSION | \
+  sed -e 's/^[^.]*$/0/' -e 's/\..*//'`]])
+AC_SUBST(PLOVER_MINOR_VERSION,[[`echo $VERSION | \
+  sed -e 's/.*/&.0.0/' -e 's/[^.]*\.\([^.]*\)\..*/\1/'`]])
+AC_SUBST(PLOVER_MICRO_VERSION,[[`echo $VERSION | \
+  sed -e 's/.*/&.0.0.0/' -e 's/\([^.]*\.\)\{2\}\([^.]*\)\..*/\2/'`]])
+AC_SUBST(PLOVER_PATCH_LEVEL,[[`echo $VERSION | \
+  sed -e 's/.*/&.0.0.0.0/' -e 's/\([^.]*\.\)\{3\}\([^.]*\)\..*/\2/'`]])
 AC_CANONICAL_HOST
 AC_SUBST(HOST_OS,$host_os)
 AC_SUBST(HOST_CPU,$host_cpu)