diff --git a/source/blender/blenkernel/intern/mesh.c b/source/blender/blenkernel/intern/mesh.c
index ea2e634ed64..7280af18493 100644
--- a/source/blender/blenkernel/intern/mesh.c
+++ b/source/blender/blenkernel/intern/mesh.c
@@ -2061,8 +2061,11 @@ void BKE_mesh_convert_mfaces_to_mpolys(Mesh *mesh)
 
 	/*build edge hash*/
 	me = mesh->medge;
-	for (i=0; i<mesh->totedge; i++, me++) {
+	for (i = 0; i < mesh->totedge; i++, me++) {
 		BLI_edgehash_insert(eh, me->v1, me->v2, SET_INT_IN_POINTER(i));
+
+		/* unrelated but avoid having the FGON flag enabled, so we can reuse it later for something else */
+		me->flag &= ~ME_FGON;
 	}
 
 	j = 0; /*current loop index*/
@@ -2077,7 +2080,7 @@ void BKE_mesh_convert_mfaces_to_mpolys(Mesh *mesh)
 		mp->mat_nr = mf->mat_nr;
 		mp->flag = mf->flag;
 		
-		#define ML(v1, v2) {ml->v = mf->v1; ml->e = GET_INT_FROM_POINTER(BLI_edgehash_lookup(eh, mf->v1, mf->v2)); ml++; j++;}
+#		define ML(v1, v2) {ml->v = mf->v1; ml->e = GET_INT_FROM_POINTER(BLI_edgehash_lookup(eh, mf->v1, mf->v2)); ml++; j++;}
 		
 		ML(v1, v2);
 		ML(v2, v3);
@@ -2089,7 +2092,7 @@ void BKE_mesh_convert_mfaces_to_mpolys(Mesh *mesh)
 			ML(v3, v1);
 		}
 		
-		#undef ML
+#		undef ML
 
 		bm_corners_to_loops(mesh, i, mp->loopstart, numTex, numCol);
 	}
diff --git a/source/blender/makesdna/DNA_meshdata_types.h b/source/blender/makesdna/DNA_meshdata_types.h
index 9891469c29b..89ed3ba055f 100644
--- a/source/blender/makesdna/DNA_meshdata_types.h
+++ b/source/blender/makesdna/DNA_meshdata_types.h
@@ -257,7 +257,7 @@ typedef struct MRecast {
 /* medge->flag (1=SELECT)*/
 #define ME_EDGEDRAW			(1<<1)
 #define ME_SEAM				(1<<2)
-/* #define ME_FGON			(1<<3) */ /* no longer used (now we have ngons) */
+#define ME_FGON				(1<<3) /* no longer used (now we have ngons), only defined so we can clear it */
 						/* reserve 16 for ME_HIDE */
 #define ME_EDGERENDER		(1<<5)
 #define ME_LOOSEEDGE		(1<<7)