diff --git a/src/maploader/glnodes.cpp b/src/maploader/glnodes.cpp
index 986dd6cd8..20637ae92 100644
--- a/src/maploader/glnodes.cpp
+++ b/src/maploader/glnodes.cpp
@@ -459,7 +459,7 @@ bool MapLoader::LoadGLSubsectors(FileReader &lump)
 		for (i = 0; i < numsubsectors; i++)
 		{
 			subsectors[i].sprites.Clear();
-			memset((void*)&subsectors[i], 0, sizeof(mapsubsector_t));
+			memset((void*)&subsectors[i], 0, sizeof(subsector_t));
 		}
 
 		for (i=0; i<numsubsectors; i++)
@@ -486,7 +486,7 @@ bool MapLoader::LoadGLSubsectors(FileReader &lump)
 		for (i = 0; i < numsubsectors; i++)
 		{
 			subsectors[i].sprites.Clear();
-			memset((void*)&subsectors[i], 0, sizeof(mapsubsector_t));
+			memset((void*)&subsectors[i], 0, sizeof(subsector_t));
 		}
 
 		for (i=0; i<numsubsectors; i++)
diff --git a/src/utility/nodebuilder/nodebuild_extract.cpp b/src/utility/nodebuilder/nodebuild_extract.cpp
index 669a0c832..300f07792 100644
--- a/src/utility/nodebuilder/nodebuild_extract.cpp
+++ b/src/utility/nodebuilder/nodebuild_extract.cpp
@@ -190,7 +190,7 @@ void FNodeBuilder::ExtractMini (FMiniBSP *bsp)
 	for (i = 0; i < bsp->Subsectors.Size(); ++i)
 	{
 		bsp->Subsectors[i].sprites.Clear();
-		memset((void*)&bsp->Subsectors[i], 0, sizeof(mapsubsector_t));
+		memset((void*)&bsp->Subsectors[i], 0, sizeof(subsector_t));
 	}
 
 	bsp->Nodes.Resize(Nodes.Size());