diff --git a/Makefile.am b/Makefile.am
index 05077f2a..da9ef488 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -21,7 +21,6 @@ ACLOCAL_AMFLAGS = -I m4
 
 SUBDIRS = lib \
           src \
-          tools/make_regional_mosaic \
           tools/make_solo_mosaic \
           tools/make_topog \
           tools/make_vgrid \
diff --git a/configure.ac b/configure.ac
index 6cffeff6..0c3dd52c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -261,7 +261,6 @@ AC_CONFIG_FILES([Makefile
                  man/Makefile
                  src/Makefile
                  tests/Makefile
-                 tools/make_regional_mosaic/Makefile
                  tools/make_solo_mosaic/Makefile
                  tools/make_topog/Makefile
                  tools/make_vgrid/Makefile
diff --git a/src/Makefile.am b/src/Makefile.am
index 0dd138b7..5e3e60d2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -11,6 +11,7 @@ grid_programs = \
   make_coupler_mosaic \
   make_hgrid \
   make_land_domain \
+  make_regional_mosaic \
   make_remap_file \
   make_quick_mosaic
 
@@ -334,3 +335,9 @@ make_land_domain_SOURCES = \
 # ********************************************************* #
 make_quick_mosaic_SOURCES = \
   make-quick-mosaic/make_quick_mosaic.c
+
+# ********************************************************* #
+# make_regional_mosaic                                      #
+# ********************************************************* #
+make_regional_mosaic_SOURCES = \
+  make-regional-mosaic/make_regional_mosaic.c
diff --git a/tools/make_regional_mosaic/CHANGELOG b/src/make-regional-mosaic/CHANGELOG
similarity index 100%
rename from tools/make_regional_mosaic/CHANGELOG
rename to src/make-regional-mosaic/CHANGELOG
diff --git a/tools/make_regional_mosaic/make_regional_mosaic.c b/src/make-regional-mosaic/make_regional_mosaic.c
similarity index 100%
rename from tools/make_regional_mosaic/make_regional_mosaic.c
rename to src/make-regional-mosaic/make_regional_mosaic.c
diff --git a/tools/make_regional_mosaic/Makefile.am b/tools/make_regional_mosaic/Makefile.am
deleted file mode 100644
index a29143c9..00000000
--- a/tools/make_regional_mosaic/Makefile.am
+++ /dev/null
@@ -1,27 +0,0 @@
-#***********************************************************************
-#                   GNU Lesser General Public License
-#
-# This file is part of the GFDL FRE NetCDF tools package (FRE-NCTools).
-#
-# FRE-NCTools is free software: you can redistribute it and/or modify it under
-# the terms of the GNU Lesser General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or (at
-# your option) any later version.
-#
-# FRE-NCTools is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-# for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with FRE-NCTools.  If not, see
-# <http://www.gnu.org/licenses/>.
-#***********************************************************************
-bin_PROGRAMS = make_regional_mosaic
-
-AM_CFLAGS = -I$(top_srcdir)/lib/libfrencutils \
-            $(NETCDF_CFLAGS)
-LDADD = $(top_builddir)/lib/libfrencutils/libfrencutils.a \
-        $(NETCDF_LDFLAGS) $(NETCDF_LIBS)  $(RPATH_FLAGS)
-
-make_regional_mosaic_SOURCES = make_regional_mosaic.c