diff --git a/modules/fluka/CMakeLists.txt b/modules/fluka/CMakeLists.txt
index e3738f7358d031819abc0e484e38a6cee8b845f9..5b7a60b5694b4395008597cf821137cb713d0fc4 100644
--- a/modules/fluka/CMakeLists.txt
+++ b/modules/fluka/CMakeLists.txt
@@ -56,7 +56,6 @@ else()
             COMMAND ${input_dir}/extract_version.sh ${C8_FLUKALIB_}
             RESULT_VARIABLE ret
             OUTPUT_VARIABLE extracted_fluka_version
-            ECHO_OUTPUT_VARIABLE
             OUTPUT_STRIP_TRAILING_WHITESPACE
         )
         if (ret AND NOT ret EQUAL "0" OR extracted_fluka_version STREQUAL "")