diff --git a/modules/acore/cmake/compiler/clang/settings.cmake b/modules/acore/cmake/compiler/clang/settings.cmake
index 28db45aea..4dad4cb78 100644
--- a/modules/acore/cmake/compiler/clang/settings.cmake
+++ b/modules/acore/cmake/compiler/clang/settings.cmake
@@ -2,7 +2,7 @@
 add_definitions(-D_BUILD_DIRECTIVE='"$(CONFIGURATION)"')
 
 if(WITH_WARNINGS)
-  set(WARNING_FLAGS "-W -Wall -Wextra -Winit-self -Wfatal-errors")
+  set(WARNING_FLAGS "-W -Wall -Wextra -Winit-self -Wfatal-errors -Wno-mismatched-tags")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${WARNING_FLAGS}")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${WARNING_FLAGS} -Woverloaded-virtual")
   message(STATUS "Clang: All warnings enabled")
@@ -14,4 +14,7 @@ if(WITH_COREDEBUG)
   message(STATUS "Clang: Debug-flags set (-g3)")
 endif()
 
+# -Wno-narrowing needed to suppress a warning in g3d
+# -Wno-deprecated-register is needed to suppress 185 gsoap warnings on Unix systems.
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wno-narrowing -Wno-deprecated-register")
+set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DDEBUG=1")