diff --git a/config/nrfconnect/app/enable-gnu-std.cmake b/config/nrfconnect/app/enable-gnu-std.cmake
index 5f31e1a5c6..4019bbd31b 100644
--- a/config/nrfconnect/app/enable-gnu-std.cmake
+++ b/config/nrfconnect/app/enable-gnu-std.cmake
@@ -1,6 +1,5 @@
 add_library(gnu17 INTERFACE)
 target_compile_options(gnu17
     INTERFACE 
-        $<$<COMPILE_LANGUAGE:CXX>:-std=gnu++17>
-        -D_SYS__PTHREADTYPES_H_)
+        $<$<COMPILE_LANGUAGE:CXX>:-std=gnu++17>)
 target_link_libraries(app PRIVATE gnu17)