diff --git a/CMakeLists.txt b/CMakeLists.txt
index 90943e61..02068369 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -88,6 +88,10 @@ else()
     set(CMAKE_CXX_FLAGS "-O3 -std=c++17")
 endif (MSVC)
 
+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")
 target_link_libraries(sdrpp PRIVATE sdrpp_core)
 
diff --git a/core/CMakeLists.txt b/core/CMakeLists.txt
index 8efd53c1..0d4362f7 100644
--- a/core/CMakeLists.txt
+++ b/core/CMakeLists.txt
@@ -10,6 +10,10 @@ else()
 endif (MSVC)
 add_definitions(-DSDRPP_IS_CORE)
 
+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
 add_compile_definitions(INSTALL_PREFIX="${CMAKE_INSTALL_PREFIX}")
 
diff --git a/readme.md b/readme.md
index 0be399b9..d7211cca 100644
--- a/readme.md
+++ b/readme.md
@@ -21,7 +21,6 @@ SDR++ is a cross-platform and open source SDR software with the aim of being blo
 * Digital demodulators and decoders
 * Light theme (I know you weirdos exist lol)
 * Waterfall color scheme editor
-* Switchable fft size
 * other small customisation options
 
 # Installing