diff --git a/folly/test/SynchronizedTest.cpp b/folly/test/SynchronizedTest.cpp
index ac4f1a373cf..8789dded88c 100644
--- a/folly/test/SynchronizedTest.cpp
+++ b/folly/test/SynchronizedTest.cpp
@@ -578,7 +578,7 @@ class TryLockable {
   bool tryLockImpl(int lockableMask) {
     // if the lockable type of this instance is one of the possible options as
     // expressed in the mask go through the usual test code
-    if (kLockableType | lockableMask) {
+    if (kLockableType & lockableMask) {
       if (kShouldSucceed) {
         onLock();
         return true;
@@ -592,7 +592,7 @@ class TryLockable {
     return false;
   }
   void unlockImpl(int lockableMask) {
-    if (kLockableType | lockableMask) {
+    if (kLockableType & lockableMask) {
       onUnlock();
       return;
     }