diff --git a/tools/codes_config.in b/tools/codes_config.in
index cd5d9c726..53fe1f8bf 100755
--- a/tools/codes_config.in
+++ b/tools/codes_config.in
@@ -33,7 +33,7 @@ print_feature()
   fi
 }
 
-
+build_type="@CMAKE_BUILD_TYPE@"
 info()
 {
   echo "ecCodes version (${ECCODES_VERSION_STR}), git-sha1 ${ECCODES_GIT_SHA1}"
@@ -45,7 +45,12 @@ info()
   echo "  processor       : @CMAKE_SYSTEM_PROCESSOR@"
   echo "  sources         : @PROJECT_SOURCE_DIR@"
   echo "  c++ compiler    : @CMAKE_CXX_COMPILER_ID@ @CMAKE_CXX_COMPILER_VERSION@"
-  echo "    flags         : @CMAKE_CXX_FLAGS@"
+  # Add the most common build type
+  if [ $build_type = "RelWithDebInfo" ]; then
+    echo "    flags         : @CMAKE_CXX_FLAGS_RELWITHDEBINFO@"
+  else
+    echo "    flags         : @CMAKE_CXX_FLAGS@"
+  fi
 #  echo "  fortran compiler: @CMAKE_Fortran_COMPILER_ID@ @CMAKE_Fortran_COMPILER_VERSION@"
 #  echo "    flags         : @ECCODES_Fortran_FLAGS@"
   echo ""