diff --git a/extras/conf/udb/Includes/SRB222_linedefs.cfg b/extras/conf/udb/Includes/SRB222_linedefs.cfg
index 9b520a56e..e46f533f7 100644
--- a/extras/conf/udb/Includes/SRB222_linedefs.cfg
+++ b/extras/conf/udb/Includes/SRB222_linedefs.cfg
@@ -1967,6 +1967,30 @@ udmf
 				}
 			}
 		}
+
+		262
+		{
+			title = "Thwomp Block";
+			prefix = "(262)";
+			arg0
+			{
+				title = "Target sector tag";
+				type = 13;
+			}
+			arg1
+			{
+				title = "Falling speed";
+			}
+			arg2
+			{
+				title = "Rising speed";
+			}
+			stringarg0
+			{
+				title = "Crushing sound";
+				type = 2;
+			}
+		}
 	}
 
 	linedefexecmisc
diff --git a/src/p_spec.c b/src/p_spec.c
index 3b86857d2..0526d34ff 100644
--- a/src/p_spec.c
+++ b/src/p_spec.c
@@ -7002,6 +7002,21 @@ void P_SpawnSpecials(boolean fromnetsave)
 				}
 				break;
 
+			case 262: // Add thwomp thinker to FOF
+				if (udmf)
+				{
+					UINT16 sound = (lines[i].stringargs[0]) ? get_number(lines[i].stringargs[0]) : sfx_thwomp;
+
+					for (l = -1; (l = P_FindLineFromTag(lines[i].args[0], l)) >= 0 ;)
+					{
+						if (lines[l].special < 100 || lines[l].special >= 300)
+							continue;
+
+						P_AddThwompThinker(lines[l].frontsector, lines[l].args[0], &lines[l], lines[i].args[1] << FRACBITS, lines[i].args[2] << FRACBITS, sound);
+					}
+				}
+				break;
+
 			case 300: // Linedef executor (combines with sector special 974/975) and commands
 			case 302:
 			case 303: