diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 33d5948c7..91c4c3620 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -859,7 +859,7 @@ if(ENABLE_CHANNELRX_REMOTETCPSINK)
     ExternalProject_Add(flac
             GIT_REPOSITORY https://github.com/xiph/flac.git
             PREFIX "${EXTERNAL_BUILD_LIBRARIES}/flac"
-            CMAKE_ARGS ${COMMON_CMAKE_ARGS} -DINSTALL_MANPAGES=OFF -D=BUILD_SHARED_LIBS=ON -DWITH_FORTIFY_SOURCE=OFF -DWITH_STACK_PROTECTOR=PFF -DBUILD_PROGRAMS=OFF -DBUILD_TESTING=OFF -DBUILD_EXAMPLES=OFF -DWITH_OGG=OFF -DBUILD_DOCS=OFF
+            CMAKE_ARGS ${COMMON_CMAKE_ARGS} -DINSTALL_MANPAGES=OFF -DBUILD_SHARED_LIBS=ON -DWITH_FORTIFY_SOURCE=OFF -DWITH_STACK_PROTECTOR=PFF -DBUILD_PROGRAMS=OFF -DBUILD_TESTING=OFF -DBUILD_EXAMPLES=OFF -DWITH_OGG=OFF -DBUILD_DOCS=OFF
             BUILD_BYPRODUCTS "${FLAC_LIBRARIES}"
             INSTALL_COMMAND ""
             TEST_COMMAND ""