diff --git a/parallel-rdp/wsi_platform.cpp b/parallel-rdp/wsi_platform.cpp
index 5259c7ce..e9911874 100644
--- a/parallel-rdp/wsi_platform.cpp
+++ b/parallel-rdp/wsi_platform.cpp
@@ -28,7 +28,7 @@ std::vector<const char *> SDL_WSIPlatform::get_instance_extensions()
 	}
 
 	std::vector<const char *> extensionNames;
-	for (int i = 0; i < extensionCount; ++i)
+	for (unsigned int i = 0; i < extensionCount; ++i)
 	{
 		extensionNames.push_back(extensions[i]);
 	}