diff --git a/source/blender/blenkernel/intern/customdata.cc b/source/blender/blenkernel/intern/customdata.cc
index d235e6d15e1..8b752fc3533 100644
--- a/source/blender/blenkernel/intern/customdata.cc
+++ b/source/blender/blenkernel/intern/customdata.cc
@@ -1793,10 +1793,10 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
     {sizeof(float[3]), "vec3f", 1, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr},
     /* 44: CD_RADIUS */
     {sizeof(float), "MFloatProperty", 1, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr},
-    /* 45: CD_HAIRCURVE */ /* DEPRECATED */
-    {-1, "HairCurve", 1, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr},
-    /* 46: CD_HAIRMAPPING */ /* DEPRECATED */
-    {-1, "HairMapping", 1, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr},
+    /* 45: CD_HAIRCURVE */ /* UNUSED */
+    {-1, "", 1, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr},
+    /* 46: CD_HAIRMAPPING */ /* UNUSED */
+    {-1, "", 1, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr},
     /* 47: CD_PROP_COLOR */
     {sizeof(MPropCol),
      "MPropCol",
diff --git a/source/blender/makesdna/DNA_customdata_types.h b/source/blender/makesdna/DNA_customdata_types.h
index 629a5e88de7..ddeab9a0759 100644
--- a/source/blender/makesdna/DNA_customdata_types.h
+++ b/source/blender/makesdna/DNA_customdata_types.h
@@ -160,10 +160,10 @@ typedef enum CustomDataType {
   CD_CUSTOMLOOPNORMAL = 41,
   CD_SCULPT_FACE_SETS = 42,
 
-  /* CD_LOCATION = 43, */ /* UNUSED */
-  /* CD_RADIUS = 44, */   /* UNUSED */
-  CD_HAIRCURVE = 45,
-  CD_HAIRMAPPING = 46,
+  /* CD_LOCATION = 43, */    /* UNUSED */
+  /* CD_RADIUS = 44, */      /* UNUSED */
+  /* CD_HAIRCURVE = 45, */   /* UNUSED, can be reused. */
+  /* CD_HAIRMAPPING = 46, */ /* UNUSED, can be reused. */
 
   CD_PROP_COLOR = 47,
   CD_PROP_FLOAT3 = 48,