diff --git a/bin/find-unneeded-includes b/bin/find-unneeded-includes
index d1e7c8ad0d8d..423aa4eae64b 100755
--- a/bin/find-unneeded-includes
+++ b/bin/find-unneeded-includes
@@ -131,6 +131,8 @@ def ignoreRemoval(include, toAdd, absFileName, moduleRules, noexclude):
         return True
     if include == "libetonyek/libetonyek.h" and "libetonyek/EtonyekDocument.h" in toAdd:
         return True
+    if include == "box2d/box2d.h" and "box2d/b2_world.h" in toAdd:
+        return True
 
     noRemove = (
         # <https://www.openoffice.org/tools/CodingGuidelines.sxw> insists on not
diff --git a/slideshow/IwyuFilter_slideshow.yaml b/slideshow/IwyuFilter_slideshow.yaml
index 6581db9743fb..6fec72c4eb9f 100644
--- a/slideshow/IwyuFilter_slideshow.yaml
+++ b/slideshow/IwyuFilter_slideshow.yaml
@@ -11,9 +11,6 @@ excludelist:
     - config_lgpl.h
     # Wrapper for external lib
     - glm/gtc/type_ptr.hpp
-    slideshow/source/engine/box2dtools.cxx:
-    # Macro BOX2D_HEADER is resolved to this
-    - box2d/box2d.h
     slideshow/source/engine/opengl/Operation.cxx:
     # Wrapper for external lib
     - glm/gtc/matrix_transform.hpp