2 files changed, 4 insertions, 4 deletions
diff --git a/src/dyetool/gui/viewport.cpp b/src/dyetool/gui/viewport.cpp
index b01d27833..786b7a4f1 100644
--- a/src/dyetool/gui/viewport.cpp
+++ b/src/dyetool/gui/viewport.cpp
@@ -86,7 +86,7 @@ void Viewport::setMap(Map *const map A_UNUSED)
 {
 }
 
-void Viewport::draw(Graphics *graphics)
+void Viewport::draw(Graphics *const graphics)
 {
     BLOCK_START("Viewport::draw 1")
     static int lastTick = tick_time;
@@ -104,7 +104,7 @@ void Viewport::draw(Graphics *graphics)
     BLOCK_END("Viewport::draw 1")
 }
 
-void Viewport::safeDraw(Graphics *graphics)
+void Viewport::safeDraw(Graphics *const graphics)
 {
     Viewport::draw(graphics);
 }
diff --git a/src/dyetool/gui/viewport.h b/src/dyetool/gui/viewport.h
index 53b825066..763371338 100644
--- a/src/dyetool/gui/viewport.h
+++ b/src/dyetool/gui/viewport.h
@@ -69,9 +69,9 @@ class Viewport final : public WindowContainer,
         /**
          * Draws the viewport.
          */
-        void draw(Graphics *graphics) override final A_NONNULL(2);
+        void draw(Graphics *const graphics) override final A_NONNULL(2);
 
-        void safeDraw(Graphics *graphics) override final A_NONNULL(2);
+        void safeDraw(Graphics *const graphics) override final A_NONNULL(2);
 
         /**
          * Implements player to keep following mouse.