diff --git a/offloading-cacher/cache.hpp b/offloading-cacher/cache.hpp
index 01e4f49..c96c468 100644
--- a/offloading-cacher/cache.hpp
+++ b/offloading-cacher/cache.hpp
@@ -40,13 +40,13 @@ namespace dml {
 
 namespace dsacache {
     inline bool CheckFlag(const uint64_t value, const uint64_t flag) {
-        return (value & ~flag) != 0ULL;
+        return (value & flag) != 0;
     }
     inline uint64_t UnsetFlag(const uint64_t value, const uint64_t flag) {
-        return value & ~flag;
+        return value & (~flag);
     }
     inline uint64_t SetFlag(const uint64_t value, const uint64_t flag) {
-        return value + flag;
+        return value | flag;
     }
 
     constexpr uint64_t FLAG_WAIT_WEAK = 0b1ULL << 63;
@@ -723,7 +723,6 @@ inline void dsacache::CacheData::WaitOnCompletion() {
     // otherwise the cache will be set to valid now
 
     if (result.status != dml::status_code::ok) {
-
         cache_->store(src_);
         numa_free(*incomplete_cache_, size_);
         delete_ = false;
diff --git a/qdp_project/src/Benchmark.cpp b/qdp_project/src/Benchmark.cpp
index 12d829c..d7dc302 100644
--- a/qdp_project/src/Benchmark.cpp
+++ b/qdp_project/src/Benchmark.cpp
@@ -200,7 +200,7 @@ int main() {
         // it will use the copy and caching policy from BenchmarkHelpers.cpp
         // which is configured for xeonmax with smart assignment
         uint64_t cache_flags = 0;
-        cache_flags += dsacache::FLAG_WAIT_WEAK;
+        cache_flags |= dsacache::FLAG_WAIT_WEAK;
         CACHE_.SetFlags(cache_flags);
         CACHE_.Init(CachePlacementPolicy, CopyMethodPolicy);
     }