diff --git a/mappings/net/minecraft/block/material/Material.mapping b/mappings/net/minecraft/block/material/Material.mapping
index 1f1c737b32..2e39102aff 100644
--- a/mappings/net/minecraft/block/material/Material.mapping
+++ b/mappings/net/minecraft/block/material/Material.mapping
@@ -55,7 +55,7 @@ CLASS none/ayo net/minecraft/block/material/Material
 	METHOD k isOpaque ()Z
 	METHOD l getHarvestable ()Z
 	METHOD m getPistonBehavior ()Lnone/ayr;
-	METHOD n setPistonBlocking ()Lnone/ayo;
-	METHOD o setPistonBreakable ()Lnone/ayo;
+	METHOD n setPistonBreakable ()Lnone/ayo;
+	METHOD o setPistonBlocking ()Lnone/ayo;
 	METHOD r getMapColor ()Lnone/ayp;
 	METHOD s setTransparent ()Lnone/ayo;
diff --git a/mappings/net/minecraft/block/piston/PistonBehavior.mapping b/mappings/net/minecraft/block/piston/PistonBehavior.mapping
index eedd3b5a55..c10d3be1bc 100644
--- a/mappings/net/minecraft/block/piston/PistonBehavior.mapping
+++ b/mappings/net/minecraft/block/piston/PistonBehavior.mapping
@@ -1,5 +1,5 @@
 CLASS none/ayr net/minecraft/block/piston/PistonBehavior
 	FIELD a MOVE Lnone/ayr;
-	FIELD b BLOCK Lnone/ayr;
-	FIELD c BREAK Lnone/ayr;
+	FIELD b BREAK Lnone/ayr;
+	FIELD c BLOCK Lnone/ayr;
 	FIELD d IGNORE Lnone/ayr;