diff --git a/src/display.cpp b/src/display.cpp
index 468d229a40a..3baa02383ad 100644
--- a/src/display.cpp
+++ b/src/display.cpp
@@ -247,8 +247,6 @@ display::display(const display_context* dc,
 	if(zoom_ != preferences::tile_size())	// correct saved tile_size if necessary
 		preferences::set_tile_size(zoom_);
 
-	image::set_zoom(zoom_);
-
 	init_flags();
 
 	if(!menu_buttons_.empty() || !action_buttons_.empty()) {
@@ -1936,7 +1934,6 @@ bool display::set_zoom(unsigned int amount, const bool validate_value_and_set_in
 	}
 
 	preferences::set_tile_size(zoom_);
-	image::set_zoom(zoom_);
 
 	labels().recalculate_labels();
 	redraw_background_ = true;
@@ -2211,8 +2208,6 @@ void display::scroll_to_tiles(const std::vector<map_location>::const_iterator &
 
 void display::bounds_check_position()
 {
-	const unsigned int orig_zoom = zoom_;
-
 	if(zoom_ < MinZoom) {
 		zoom_ = MinZoom;
 	}
@@ -2222,10 +2217,6 @@ void display::bounds_check_position()
 	}
 
 	bounds_check_position(xpos_, ypos_);
-
-	if(zoom_ != orig_zoom) {
-		image::set_zoom(zoom_);
-	}
 }
 
 void display::bounds_check_position(int& xpos, int& ypos) const
diff --git a/src/picture.cpp b/src/picture.cpp
index b0999f03ab0..da68d11896a 100644
--- a/src/picture.cpp
+++ b/src/picture.cpp
@@ -197,8 +197,6 @@ std::set<std::string> precached_dirs;
 
 int red_adjust = 0, green_adjust = 0, blue_adjust = 0;
 
-unsigned int zoom = tile_size;
-
 const std::string data_uri_prefix = "data:";
 struct parsed_data_URI{
 	explicit parsed_data_URI(std::string_view data_URI);
@@ -759,12 +757,6 @@ void set_color_adjustment(int r, int g, int b)
 	}
 }
 
-void set_zoom(unsigned int amount)
-{
-	// This no longer has to do anything fancy.
-	zoom = amount;
-}
-
 static surface get_hexed(const locator& i_locator, bool skip_cache = false)
 {
 	surface image(get_surface(i_locator, UNSCALED, skip_cache));
diff --git a/src/picture.hpp b/src/picture.hpp
index 7cc07be5e02..d7890b5ebbb 100644
--- a/src/picture.hpp
+++ b/src/picture.hpp
@@ -222,14 +222,6 @@ struct manager
  */
 void set_color_adjustment(int r, int g, int b);
 
-/**
- * Sets the scaling factor for images.
- *
- * Changing the previous value automatically invalidates all cached scaled
- * images.
- */
-void set_zoom(unsigned int zoom);
-
 /**
  * Used to specify the rendering format of images.
  */