diff --git a/CMakeLists.txt b/CMakeLists.txt
index e3878778b..f52cfa830 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -64,6 +64,7 @@ endif()
 
 ecbuild_debug("ECCODES_BIG_ENDIAN=${ECCODES_BIG_ENDIAN}")
 ecbuild_debug("ECCODES_LITTLE_ENDIAN=${ECCODES_LITTLE_ENDIAN}")
+ecbuild_info("Operating system=${CMAKE_SYSTEM} (${EC_OS_BITS} bits)")
 
 ###############################################################################
 # some variables/options of this project