diff --git a/src/p_maputl.cpp b/src/p_maputl.cpp
index 5d86f9559..1c3727aab 100644
--- a/src/p_maputl.cpp
+++ b/src/p_maputl.cpp
@@ -1362,3 +1362,4 @@ static AActor *RoughBlockCheck (AActor *mo, int index)
 	}
 	return NULL;
 }
+
diff --git a/src/p_spec.cpp b/src/p_spec.cpp
index d724d4f31..a3569c580 100644
--- a/src/p_spec.cpp
+++ b/src/p_spec.cpp
@@ -762,10 +762,16 @@ DWallLightTransfer::DWallLightTransfer (sector_t *srcSec, int target, BYTE flags
 	for (linenum = -1; (linenum = P_FindLineFromID (target, linenum)) >= 0; )
 	{
 		if (flags & WLF_SIDE1 && lines[linenum].sidenum[0]!=NO_SIDE)
+		{
+			sides[lines[linenum].sidenum[0]].Flags &= ~WALLF_AUTOCONTRAST;
 			sides[lines[linenum].sidenum[0]].Flags |= wallflags;
+		}
 
 		if (flags & WLF_SIDE2 && lines[linenum].sidenum[1]!=NO_SIDE)
+		{
+			sides[lines[linenum].sidenum[0]].Flags &= ~WALLF_AUTOCONTRAST;
 			sides[lines[linenum].sidenum[1]].Flags |= wallflags;
+		}
 	}
 	ChangeStatNum(STAT_LIGHTTRANSFER);
 }
diff --git a/src/version.h b/src/version.h
index 05f83ef2a..974086fc3 100644
--- a/src/version.h
+++ b/src/version.h
@@ -75,7 +75,7 @@
 // SAVESIG should match SAVEVER.
 
 // MINSAVEVER is the minimum level snapshot version that can be loaded.
-#define MINSAVEVER 964
+#define MINSAVEVER 992
 
 #if SVN_REVISION_NUMBER < MINSAVEVER
 // Never write a savegame with a version lower than what we need