diff --git a/share/cmake/extract_flags.cmake b/share/cmake/extract_flags.cmake
index dfcf67b0..6bce43c2 100644
--- a/share/cmake/extract_flags.cmake
+++ b/share/cmake/extract_flags.cmake
@@ -76,10 +76,14 @@ macro(extract_flags)
     list(REMOVE_ITEM sys_inc_dirs ${inc_dirs})
   endif()
   foreach(dir ${inc_dirs})
-    set(${target}_CXXFLAGS "${${target}_CXXFLAGS} -I${dir}")
+    if(NOT dir STREQUAL "/usr/include")
+      set(${target}_CXXFLAGS "${${target}_CXXFLAGS} -I${dir}")
+    endif()
   endforeach()
   foreach(dir ${sys_inc_dirs})
-    set(${target}_CXXFLAGS "${${target}_CXXFLAGS} -isystem${dir}")
+    if(NOT dir STREQUAL "/usr/include")
+      set(${target}_CXXFLAGS "${${target}_CXXFLAGS} -isystem${dir}")
+    endif()
   endforeach()
 
   get_property_recursive(libs TARGET ${target} PROPERTY INTERFACE_LINK_LIBRARIES)