diff --git a/cmake/compiler_flags.cmake b/cmake/compiler_flags.cmake
index 765f87f830a671b22a2007afad0af00da67d7245..b7aacc23c32bdbf6e06f3e10dd140d708a44cea1 100644
--- a/cmake/compiler_flags.cmake
+++ b/cmake/compiler_flags.cmake
@@ -34,6 +34,10 @@ if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
     set(libClaPP_TEST_CXX_PEDANTIC_COMPILE_OPTIONS ${libClaPP_CXX_PEDANTIC_COMPILE_OPTIONS})
 elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
     list(APPEND libClaPP_CXX_PEDANTIC_COMPILE_OPTIONS -Weverything -Wno-c++98-compat -Wno-c++98-compat-pedantic -Wno-padded -Werror -pedantic-errors)
+    if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "10.0.0")
+        #before clang-10, it issues a warning if a range-based-for loop (of const ref) is used.
+        list(APPEND libClaPP_CXX_PEDANTIC_COMPILE_OPTIONS -Wno-range-loop-analysis)
+    endif()
     set(libClaPP_TEST_CXX_PEDANTIC_COMPILE_OPTIONS ${libClaPP_CXX_PEDANTIC_COMPILE_OPTIONS})
     list(APPEND libClaPP_TEST_CXX_PEDANTIC_COMPILE_OPTIONS -Wno-global-constructors)
 endif()