diff --git a/configure.ac b/configure.ac
index 3c5b7e0a9..740ba7fce 100644
--- a/configure.ac
+++ b/configure.ac
@@ -19,9 +19,9 @@ AC_INIT([netCDF],[4.9.3-development],[support-netcdf@unidata.ucar.edu],[netcdf-c
 ##
 : ${CFLAGS=""}
 
-AC_SUBST([NC_VERSION_MAJOR]) NC_VERSION_MAJOR=4
-AC_SUBST([NC_VERSION_MINOR]) NC_VERSION_MINOR=9
-AC_SUBST([NC_VERSION_PATCH]) NC_VERSION_PATCH=3
+AC_SUBST([netCDF_VERSION_MAJOR]) netCDF_VERSION_MAJOR=4
+AC_SUBST([netCDF_VERSION_MINOR]) netCDF_VERSION_MINOR=9
+AC_SUBST([netCDF_VERSION_PATCH]) netCDF_VERSION_PATCH=3
 AC_SUBST([NC_VERSION_NOTE]) NC_VERSION_NOTE="-development"
 
 ##