1 files changed, 7 insertions, 2 deletions
diff --git a/src/core/model/GFDataExchanger.cpp b/src/core/model/GFDataExchanger.cpp
index 1ce03352..d847b65d 100644
--- a/src/core/model/GFDataExchanger.cpp
+++ b/src/core/model/GFDataExchanger.cpp
@@ -38,7 +38,10 @@ auto GFDataExchanger::Write(const std::byte* buffer, size_t size) -> ssize_t {
   std::unique_lock<std::mutex> lock(mutex_);
   try {
     for (size_t i = 0; i < size; i++) {
-      if (queue_.size() == queue_max_size_) not_empty_.notify_all();
+      if (queue_.size() == static_cast<unsigned long>(queue_max_size_)) {
+        not_empty_.notify_all();
+      }
+
       not_full_.wait(lock,
                      [=] { return queue_.size() < queue_max_size_ || close_; });
       if (close_) return -1;
@@ -71,7 +74,9 @@ auto GFDataExchanger::Read(std::byte* buffer, size_t size) -> ssize_t {
     read_bytes++;
   }
 
-  if (queue_.size() < queue_max_size_) not_full_.notify_all();
+  if (queue_.size() < static_cast<unsigned long>(queue_max_size_)) {
+    not_full_.notify_all();
+  }
   return read_bytes;
 }