diff --git a/common/biomesoplenty/asm/smoothing/block/BlockFluid.java b/common/biomesoplenty/asm/smoothing/block/BlockFluid.java
index c7ff1c63a..6b65ae1d1 100644
--- a/common/biomesoplenty/asm/smoothing/block/BlockFluid.java
+++ b/common/biomesoplenty/asm/smoothing/block/BlockFluid.java
@@ -70,7 +70,10 @@ public class BlockFluid
                 toInject.add(new VarInsnNode(ILOAD, 2));
                 toInject.add(new VarInsnNode(ILOAD, 3));
                 toInject.add(new VarInsnNode(ILOAD, 4));
-                toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getWaterColourMultiplier", "(Lnet/minecraft/world/IBlockAccess;III)I"));
+                if (obfuscated)
+                    toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getWaterColourMultiplier", "(Lacf;III)I"));
+                else
+                    toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getWaterColourMultiplier", "(Lnet/minecraft/world/IBlockAccess;III)I"));
                 toInject.add(new InsnNode(IRETURN));
                 
                 m.instructions.insertBefore(targetNode, toInject);
diff --git a/common/biomesoplenty/asm/smoothing/block/BlockGrass.java b/common/biomesoplenty/asm/smoothing/block/BlockGrass.java
index 14eda10fb..674b482a2 100644
--- a/common/biomesoplenty/asm/smoothing/block/BlockGrass.java
+++ b/common/biomesoplenty/asm/smoothing/block/BlockGrass.java
@@ -68,7 +68,10 @@ public class BlockGrass
                 toInject.add(new VarInsnNode(ILOAD, 2));
                 toInject.add(new VarInsnNode(ILOAD, 3));
                 toInject.add(new VarInsnNode(ILOAD, 4));
-                toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getGrassColourMultiplier", "(Lnet/minecraft/world/IBlockAccess;III)I"));
+                if (obfuscated)
+                    toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getGrassColourMultiplier", "(Lacf;III)I"));
+                else
+                    toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getGrassColourMultiplier", "(Lnet/minecraft/world/IBlockAccess;III)I"));
                 toInject.add(new InsnNode(IRETURN));
                 
                 m.instructions.insertBefore(targetNode, toInject);
diff --git a/common/biomesoplenty/asm/smoothing/block/BlockLeaves.java b/common/biomesoplenty/asm/smoothing/block/BlockLeaves.java
index 48a13f7f8..e68dfabbe 100644
--- a/common/biomesoplenty/asm/smoothing/block/BlockLeaves.java
+++ b/common/biomesoplenty/asm/smoothing/block/BlockLeaves.java
@@ -71,7 +71,10 @@ public class BlockLeaves
                 toInject.add(new VarInsnNode(ILOAD, 2));
                 toInject.add(new VarInsnNode(ILOAD, 3));
                 toInject.add(new VarInsnNode(ILOAD, 4));
-                toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getLeavesColourMultiplier", "(Lnet/minecraft/world/IBlockAccess;III)I"));
+                if (obfuscated)
+                    toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getLeavesColourMultiplier", "(Lacf;III)I"));
+                else
+                    toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getLeavesColourMultiplier", "(Lnet/minecraft/world/IBlockAccess;III)I"));
                 toInject.add(new InsnNode(IRETURN));
                 
                 m.instructions.insertBefore(targetNode, toInject);
diff --git a/common/biomesoplenty/asm/smoothing/block/BlockTallGrass.java b/common/biomesoplenty/asm/smoothing/block/BlockTallGrass.java
index 9ce9232b7..8146d3676 100644
--- a/common/biomesoplenty/asm/smoothing/block/BlockTallGrass.java
+++ b/common/biomesoplenty/asm/smoothing/block/BlockTallGrass.java
@@ -68,7 +68,10 @@ public class BlockTallGrass
                 toInject.add(new VarInsnNode(ILOAD, 2));
                 toInject.add(new VarInsnNode(ILOAD, 3));
                 toInject.add(new VarInsnNode(ILOAD, 4));
-                toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getGrassColourMultiplier", "(Lnet/minecraft/world/IBlockAccess;III)I"));
+                if (obfuscated)
+                    toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getGrassColourMultiplier", "(Lacf;III)I"));
+                else
+                    toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getGrassColourMultiplier", "(Lnet/minecraft/world/IBlockAccess;III)I"));
                 toInject.add(new InsnNode(IRETURN));
                 
                 m.instructions.insertBefore(targetNode, toInject);