diff --git a/src/renderer/gl_engine/tvgGlGeometry.h b/src/renderer/gl_engine/tvgGlGeometry.h
index acdf5c3e..de4eea58 100644
--- a/src/renderer/gl_engine/tvgGlGeometry.h
+++ b/src/renderer/gl_engine/tvgGlGeometry.h
@@ -108,14 +108,14 @@ public:
         return *this;
     }
 
-    bool operator== (const GlPoint& rhs)
+    bool operator== (const GlPoint& rhs) const
     {
         if (&rhs == this) return true;
         if (rhs.x == this->x && rhs.y == this->y) return true;
         return false;
     }
 
-    bool operator!= (const GlPoint& rhs)
+    bool operator!= (const GlPoint& rhs) const
     {
         if (&rhs == this) return true;
         if (rhs.x != this->x || rhs.y != this->y) return true;
diff --git a/src/renderer/tvgRender.h b/src/renderer/tvgRender.h
index 8f28d37d..a915d68f 100644
--- a/src/renderer/tvgRender.h
+++ b/src/renderer/tvgRender.h
@@ -103,7 +103,7 @@ struct RenderRegion
     void intersect(const RenderRegion& rhs);
     void add(const RenderRegion& rhs);
 
-    bool operator==(const RenderRegion& rhs)
+    bool operator==(const RenderRegion& rhs) const
     {
         if (x == rhs.x && y == rhs.y && w == rhs.w && h == rhs.h) return true;
         return false;