diff --git a/source/blender/blenkernel/BKE_gpencil_legacy.h b/source/blender/blenkernel/BKE_gpencil_legacy.h
index 09ca08a6397..148aedb416f 100644
--- a/source/blender/blenkernel/BKE_gpencil_legacy.h
+++ b/source/blender/blenkernel/BKE_gpencil_legacy.h
@@ -16,7 +16,6 @@ struct BlendDataReader;
 struct Brush;
 struct CurveMapping;
 struct Depsgraph;
-struct GHash;
 struct ListBase;
 struct MDeformVert;
 struct Main;
diff --git a/source/blender/blenlib/BLI_session_uid.h b/source/blender/blenlib/BLI_session_uid.h
index 4683046a5d3..c6fab034547 100644
--- a/source/blender/blenlib/BLI_session_uid.h
+++ b/source/blender/blenlib/BLI_session_uid.h
@@ -32,7 +32,7 @@ bool BLI_session_uid_is_equal(const SessionUID *lhs, const SessionUID *rhs);
 
 uint64_t BLI_session_uid_hash_uint64(const SessionUID *uid);
 
-/* Utility functions to make it possible to create GHash/GSet with UID as a key. */
+/* Utility functions to make it possible to create set/map with UID as a key. */
 
 uint BLI_session_uid_ghash_hash(const void *uid_v);
 bool BLI_session_uid_ghash_compare(const void *lhs_v, const void *rhs_v);
diff --git a/source/blender/sequencer/SEQ_animation.hh b/source/blender/sequencer/SEQ_animation.hh
index 25cab07aabd..85f2822edde 100644
--- a/source/blender/sequencer/SEQ_animation.hh
+++ b/source/blender/sequencer/SEQ_animation.hh
@@ -13,7 +13,6 @@
 #include "ANIM_action.hh"
 #include "ANIM_action_legacy.hh"
 
-struct GSet;
 struct ListBase;
 struct Scene;
 struct Sequence;