diff -ur clamav-0.100.0.orig/m4/reorganization/version.m4 clamav-0.100.0/m4/reorganization/version.m4
--- clamav-0.100.0.orig/m4/reorganization/version.m4	2018-05-28 14:50:16.761974871 +0000
+++ clamav-0.100.0/m4/reorganization/version.m4	2018-05-28 14:50:37.396974639 +0000
@@ -10,10 +10,11 @@
 
 major=`expr $LC_CURRENT - $LC_AGE`
 
-AC_DEFINE_UNQUOTED([LIBCLAMAV_FULLVER], "$major.$LC_AGE.$LC_REVISION",
+MAJOR_VER=$(( $LC_CURRENT - $LC_AGE ))
+AC_DEFINE_UNQUOTED([LIBCLAMAV_FULLVER], "$MAJOR_VER.$LC_AGE.$LC_REVISION",
         ["Full library version number"])
 
-AC_DEFINE_UNQUOTED([LIBCLAMAV_MAJORVER], $major, ["Major library version number"])
+AC_DEFINE_UNQUOTED([LIBCLAMAV_MAJORVER], $MAJOR_VER, ["Major library version number"])
 
 AC_DEFINE_UNQUOTED([VERSION],"$VERSION",[Version number of package])
 AC_DEFINE_UNQUOTED([VERSION_SUFFIX],"$VERSION_SUFFIX",[Version suffix for package])