diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0bc87a9c..fbe5b70c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -88,8 +88,8 @@ else()
     set(CMAKE_CXX_FLAGS "-O3 -std=c++17")
 endif (MSVC)
 
-if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-    include_directories("/usr/include")
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+    set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS} -undefined dynamic_lookup")
 endif()
 
 add_executable(sdrpp "src/main.cpp" "win32/resources.rc")
diff --git a/core/CMakeLists.txt b/core/CMakeLists.txt
index ffa73842..7a63d490 100644
--- a/core/CMakeLists.txt
+++ b/core/CMakeLists.txt
@@ -10,8 +10,8 @@ else()
 endif (MSVC)
 add_definitions(-DSDRPP_IS_CORE)
 
-if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-    include_directories("/usr/include")
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+    set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS} -undefined dynamic_lookup")
 endif()
 
 # Set the install prefix