diff --git a/sorc/chgres_cube.fd/CMakeLists.txt b/sorc/chgres_cube.fd/CMakeLists.txt
index 8366f4771..344f8eb6f 100644
--- a/sorc/chgres_cube.fd/CMakeLists.txt
+++ b/sorc/chgres_cube.fd/CMakeLists.txt
@@ -9,12 +9,12 @@ set(fortran_src
     grib2_util.F90
     input_data.F90
     model_grid.F90
-    program_setup.f90
-    search_util.f90
+    program_setup.F90
+    search_util.F90
     static_data.F90
     surface.F90
     thompson_mp_climo_data.F90
-    utils.f90
+    utils.F90
     write_data.F90)
 
 if(CMAKE_Fortran_COMPILER_ID MATCHES "^(Intel)$")
diff --git a/sorc/chgres_cube.fd/program_setup.f90 b/sorc/chgres_cube.fd/program_setup.F90
similarity index 100%
rename from sorc/chgres_cube.fd/program_setup.f90
rename to sorc/chgres_cube.fd/program_setup.F90
diff --git a/sorc/chgres_cube.fd/search_util.f90 b/sorc/chgres_cube.fd/search_util.F90
similarity index 100%
rename from sorc/chgres_cube.fd/search_util.f90
rename to sorc/chgres_cube.fd/search_util.F90
diff --git a/sorc/chgres_cube.fd/utils.f90 b/sorc/chgres_cube.fd/utils.F90
similarity index 100%
rename from sorc/chgres_cube.fd/utils.f90
rename to sorc/chgres_cube.fd/utils.F90
diff --git a/tests/chres_cube/CMakeLists.txt b/tests/chres_cube/CMakeLists.txt
index bf2dd2210..ba5573fd7 100644
--- a/tests/chres_cube/CMakeLists.txt
+++ b/tests/chres_cube/CMakeLists.txt
@@ -16,7 +16,7 @@ execute_process( COMMAND ${CMAKE_COMMAND} -E copy
     ${CMAKE_CURRENT_SOURCE_DIR}/config.nml
     ${CMAKE_CURRENT_BINARY_DIR}/fort.41)
 
-add_executable(ftst_utils "${CMAKE_SOURCE_DIR}/sorc/chgres_cube.fd/utils.f90" ftst_utils.F90)
+add_executable(ftst_utils "${CMAKE_SOURCE_DIR}/sorc/chgres_cube.fd/utils.F90" ftst_utils.F90)
 add_test(NAME ftst_utils COMMAND ftst_utils)
 target_link_libraries(
   ftst_utils
@@ -37,10 +37,10 @@ endif()
 
 add_executable(ftst_program_setup "${CMAKE_SOURCE_DIR}/sorc/chgres_cube.fd/input_data.F90"
   "${CMAKE_SOURCE_DIR}/sorc/chgres_cube.fd/model_grid.F90"
-  "${CMAKE_SOURCE_DIR}/sorc/chgres_cube.fd/program_setup.f90"
+  "${CMAKE_SOURCE_DIR}/sorc/chgres_cube.fd/program_setup.F90"
   "${CMAKE_SOURCE_DIR}/sorc/chgres_cube.fd/grib2_util.F90"
-  "${CMAKE_SOURCE_DIR}/sorc/chgres_cube.fd/search_util.f90"
-  "${CMAKE_SOURCE_DIR}/sorc/chgres_cube.fd/utils.f90"
+  "${CMAKE_SOURCE_DIR}/sorc/chgres_cube.fd/search_util.F90"
+  "${CMAKE_SOURCE_DIR}/sorc/chgres_cube.fd/utils.F90"
   ftst_program_setup.F90)
 add_test(NAME ftst_program_setup COMMAND ftst_program_setup)
 target_link_libraries(