diff --git a/src/map.cpp b/src/map.cpp
index b2aa7ac35..9bcbc6c00 100644
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -2313,6 +2313,7 @@ void MMVManip::blitBackAll(std::map<v3s16, MapBlock*> *modified_blocks,
 			continue;
 
 		block->copyFrom(*this);
+		block->raiseModified(MOD_STATE_WRITE_NEEDED, MOD_REASON_VMANIP);
 
 		if(modified_blocks)
 			(*modified_blocks)[p] = block;
diff --git a/src/mapblock.h b/src/mapblock.h
index 83f13f302..b93007d72 100644
--- a/src/mapblock.h
+++ b/src/mapblock.h
@@ -63,7 +63,8 @@ class VoxelManipulator;
 #define MOD_REASON_STATIC_DATA_REMOVED       (1 << 16)
 #define MOD_REASON_STATIC_DATA_CHANGED       (1 << 17)
 #define MOD_REASON_EXPIRE_DAYNIGHTDIFF       (1 << 18)
-#define MOD_REASON_UNKNOWN                   (1 << 19)
+#define MOD_REASON_VMANIP                    (1 << 19)
+#define MOD_REASON_UNKNOWN                   (1 << 20)
 
 ////
 //// MapBlock itself