diff --git a/build_tools/build_detect_platform b/build_tools/build_detect_platform
index 28b21e5a6f..1d5138dbf3 100755
--- a/build_tools/build_detect_platform
+++ b/build_tools/build_detect_platform
@@ -189,9 +189,6 @@ EOF
                 COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_IOURING_PRESENT"
             fi
         fi
-        if test -z "$USE_FOLLY_DISTRIBUTED_MUTEX"; then
-          USE_FOLLY_DISTRIBUTED_MUTEX=1
-        fi
         # PORT_FILES=port/linux/linux_specific.cc
         ;;
     SunOS)
diff --git a/build_tools/fbcode_config_platform007.sh b/build_tools/fbcode_config_platform007.sh
index f7de7fcca0..9c8e382e61 100644
--- a/build_tools/fbcode_config_platform007.sh
+++ b/build_tools/fbcode_config_platform007.sh
@@ -167,6 +167,4 @@ VALGRIND_VER="$VALGRIND_BASE/bin/"
 LUA_PATH=
 LUA_LIB=
 
-USE_FOLLY_DISTRIBUTED_MUTEX=1
-
 export CC CXX AR CFLAGS CXXFLAGS EXEC_LDFLAGS EXEC_LDFLAGS_SHARED VALGRIND_VER JEMALLOC_LIB JEMALLOC_INCLUDE CLANG_ANALYZER CLANG_SCAN_BUILD LUA_PATH LUA_LIB
diff --git a/build_tools/fbcode_config_platform009.sh b/build_tools/fbcode_config_platform009.sh
index 82c85b09c1..9308274aaf 100644
--- a/build_tools/fbcode_config_platform009.sh
+++ b/build_tools/fbcode_config_platform009.sh
@@ -168,6 +168,4 @@ VALGRIND_VER="$VALGRIND_BASE/bin/"
 LUA_PATH=
 LUA_LIB=
 
-USE_FOLLY_DISTRIBUTED_MUTEX=1
-
 export CC CXX AR CFLAGS CXXFLAGS EXEC_LDFLAGS EXEC_LDFLAGS_SHARED VALGRIND_VER JEMALLOC_LIB JEMALLOC_INCLUDE CLANG_ANALYZER CLANG_SCAN_BUILD LUA_PATH LUA_LIB