Unbreak build with libc++ (#1457)

1 files changed, 2 insertions, 2 deletions

diff --git a/src/helpers/SubsurfaceTree.hpp b/src/helpers/SubsurfaceTree.hpp
index c5d3934f..36105d2c 100644
--- a/src/helpers/SubsurfaceTree.hpp
+++ b/src/helpers/SubsurfaceTree.hpp
@@ -24,7 +24,7 @@ struct SSurfaceTreeNode {
     void*                  globalOffsetData;
     CWindow*               pWindowOwner = nullptr;
 
-    bool                   operator==(const SSurfaceTreeNode& rhs) {
+    bool                   operator==(const SSurfaceTreeNode& rhs) const {
         return pSurface == rhs.pSurface;
     }
 };
@@ -41,7 +41,7 @@ struct SSubsurface {
 
     CWindow* pWindowOwner = nullptr;
 
-    bool     operator==(const SSubsurface& rhs) {
+    bool     operator==(const SSubsurface& rhs) const {
         return pSubsurface == rhs.pSubsurface;
     }
 };