diff --git a/projects/rocr-runtime/runtime/hsa-runtime/core/inc/signal.h b/projects/rocr-runtime/runtime/hsa-runtime/core/inc/signal.h
index a1096ddde5..39e5321867 100644
--- a/projects/rocr-runtime/runtime/hsa-runtime/core/inc/signal.h
+++ b/projects/rocr-runtime/runtime/hsa-runtime/core/inc/signal.h
@@ -407,7 +407,7 @@ class Signal {
   core::Agent* async_copy_agent_;
 
  private:
-  static HybridMutex ipcLock_;
+  static KernelMutex ipcLock_;
   static std::map<decltype(hsa_signal_t::handle), Signal*> ipcMap_;
 
   static Signal* lookupIpc(hsa_signal_t signal);
diff --git a/projects/rocr-runtime/runtime/hsa-runtime/core/runtime/signal.cpp b/projects/rocr-runtime/runtime/hsa-runtime/core/runtime/signal.cpp
index eee62f5951..065f8ccc9f 100644
--- a/projects/rocr-runtime/runtime/hsa-runtime/core/runtime/signal.cpp
+++ b/projects/rocr-runtime/runtime/hsa-runtime/core/runtime/signal.cpp
@@ -52,7 +52,7 @@
 namespace rocr {
 namespace core {
 
-HybridMutex Signal::ipcLock_;
+KernelMutex Signal::ipcLock_;
 std::map<decltype(hsa_signal_t::handle), Signal*> Signal::ipcMap_;
 
 void SharedSignalPool_t::clear() {
@@ -128,7 +128,7 @@ LocalSignal::LocalSignal(hsa_signal_value_t initial_value, bool exportable)
 }
 
 void Signal::registerIpc() {
-  ScopedAcquire<HybridMutex> lock(&ipcLock_);
+  ScopedAcquire<KernelMutex> lock(&ipcLock_);
   auto handle = Convert(this);
   assert(ipcMap_.find(handle.handle) == ipcMap_.end() &&
          "Can't register the same IPC signal twice.");
@@ -136,7 +136,7 @@ void Signal::registerIpc() {
 }
 
 bool Signal::deregisterIpc() {
-  ScopedAcquire<HybridMutex> lock(&ipcLock_);
+  ScopedAcquire<KernelMutex> lock(&ipcLock_);
   if (refcount_ != 0) return false;
   auto handle = Convert(this);
   const auto& it = ipcMap_.find(handle.handle);
@@ -146,14 +146,14 @@ bool Signal::deregisterIpc() {
 }
 
 Signal* Signal::lookupIpc(hsa_signal_t signal) {
-  ScopedAcquire<HybridMutex> lock(&ipcLock_);
+  ScopedAcquire<KernelMutex> lock(&ipcLock_);
   const auto& it = ipcMap_.find(signal.handle);
   if (it == ipcMap_.end()) return nullptr;
   return it->second;
 }
 
 Signal* Signal::duplicateIpc(hsa_signal_t signal) {
-  ScopedAcquire<HybridMutex> lock(&ipcLock_);
+  ScopedAcquire<KernelMutex> lock(&ipcLock_);
   const auto& it = ipcMap_.find(signal.handle);
   if (it == ipcMap_.end()) return nullptr;
   it->second->refcount_++;