diff --git a/ground/sea.arc b/ground/sea.arc
index e6f722fa3..82a5b4a9e 100644
--- a/ground/sea.arc
+++ b/ground/sea.arc
@@ -58,7 +58,6 @@ no_pass 1
 no_pick 1
 is_water 1
 editable 8
-is_floor 1
 smoothlevel 20
 end
 Object sea_ne
@@ -71,7 +70,6 @@ no_pass 1
 no_pick 1
 is_water 1
 editable 8
-is_floor 1
 smoothlevel 20
 end
 Object sea_sw
@@ -84,7 +82,6 @@ no_pass 1
 no_pick 1
 is_water 1
 editable 8
-is_floor 1
 smoothlevel 20
 end
 Object sea_se
@@ -97,6 +94,5 @@ no_pick 1
 no_pass 1
 is_water 1
 editable 8
-is_floor 1
 smoothlevel 20
 end