diff --git a/patches/minecraft/net/minecraft/block/BlockPistonBase.java.patch b/patches/minecraft/net/minecraft/block/BlockPistonBase.java.patch
index 458395a7d5..81c2d58418 100644
--- a/patches/minecraft/net/minecraft/block/BlockPistonBase.java.patch
+++ b/patches/minecraft/net/minecraft/block/BlockPistonBase.java.patch
@@ -31,7 +31,7 @@
                  Block block = p_150077_0_.func_147439_a(i1, j1, k1);
  
 -                if (block.func_149688_o() != Material.field_151579_a)
-+                if (block.isAir(p_150077_0_, i1, j1, k1))
++                if (!block.isAir(p_150077_0_, i1, j1, k1))
                  {
                      if (!func_150080_a(block, p_150077_0_, i1, j1, k1, true))
                      {
@@ -48,7 +48,7 @@
                  Block block = p_150079_1_.func_147439_a(i1, j1, k1);
  
 -                if (block.func_149688_o() != Material.field_151579_a)
-+                if (block.isAir(p_150079_1_, i1, j1, k1))
++                if (!block.isAir(p_150079_1_, i1, j1, k1))
                  {
                      if (!func_150080_a(block, p_150079_1_, i1, j1, k1, true))
                      {