diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index 08d1f117b..bbfd763b1 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,3 +1,6 @@
+December 24, 2009  (Changes by Graf Zahl)
+- fixed: The UDMF blockfloaters flag was misnamed. Changed to match the spec.
+
 December 23, 2009  (Changes by Graf Zahl)
 - made the initial weave index for A_BishopMissileWeave and A_CStaffMissileSlither
   a configurable actor property.
diff --git a/src/namedef.h b/src/namedef.h
index a00ca93f5..ebddcc213 100644
--- a/src/namedef.h
+++ b/src/namedef.h
@@ -370,7 +370,7 @@ xx(Blockplayers)
 xx(Blockeverything)
 xx(Zoneboundary)
 xx(Jumpover)
-xx(Blockfloating)
+xx(Blockfloaters)
 xx(Clipmidtex)
 xx(Wrapmidtex)
 xx(Midtex3d)
diff --git a/src/p_udmf.cpp b/src/p_udmf.cpp
index 79b64a1de..5dfa06dd7 100644
--- a/src/p_udmf.cpp
+++ b/src/p_udmf.cpp
@@ -691,7 +691,7 @@ struct UDMFParser
 				Flag(ld->flags, ML_RAILING, key); 
 				continue;
 
-			case NAME_Blockfloating:
+			case NAME_Blockfloaters:
 				CHECK_N(St | Zd | Zdt | Va)
 				Flag(ld->flags, ML_BLOCK_FLOATERS, key); 
 				continue;