diff --git a/src/main/java/com/minelittlepony/unicopia/mixin/MixinGuardianTargetPredicate.java b/src/main/java/com/minelittlepony/unicopia/mixin/MixinGuardianTargetPredicate.java
index 3b2f31b2..14001427 100644
--- a/src/main/java/com/minelittlepony/unicopia/mixin/MixinGuardianTargetPredicate.java
+++ b/src/main/java/com/minelittlepony/unicopia/mixin/MixinGuardianTargetPredicate.java
@@ -5,7 +5,9 @@ import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
-import com.llamalad7.mixinextras.injector.ModifyReturnValue;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
 import com.minelittlepony.unicopia.entity.effect.SeaponyGraceStatusEffect;
 
 import net.minecraft.entity.LivingEntity;
@@ -16,8 +18,10 @@ abstract class MixinGuardianTargetPredicate {
     @Shadow
     private @Final GuardianEntity owner;
 
-    @ModifyReturnValue(method = "test", at = @At("RETURN"))
-    private boolean unicopia_excludeSeaponysGrace(boolean result, @Nullable LivingEntity target) {
-        return result && SeaponyGraceStatusEffect.hasIre(target, owner);
+    @Inject(method = "test", at = @At("HEAD"), cancellable = true)
+    private void unicopia_excludeSeaponysGrace(@Nullable LivingEntity target, CallbackInfoReturnable<Boolean> info) {
+        if (!SeaponyGraceStatusEffect.hasIre(target, owner)) {
+            info.setReturnValue(false);
+        }
     }
 }
diff --git a/src/main/java/com/minelittlepony/unicopia/mixin/MixinPufferfishEntity.java b/src/main/java/com/minelittlepony/unicopia/mixin/MixinPufferfishEntity.java
index 9231dafa..75ddc656 100644
--- a/src/main/java/com/minelittlepony/unicopia/mixin/MixinPufferfishEntity.java
+++ b/src/main/java/com/minelittlepony/unicopia/mixin/MixinPufferfishEntity.java
@@ -2,7 +2,9 @@ package com.minelittlepony.unicopia.mixin;
 
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;
-import com.llamalad7.mixinextras.injector.ModifyReturnValue;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
 import com.minelittlepony.unicopia.entity.effect.SeaponyGraceStatusEffect;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.passive.FishEntity;
@@ -12,8 +14,10 @@ import net.minecraft.entity.passive.PufferfishEntity;
 abstract class MixinPufferfishEntity extends FishEntity {
     MixinPufferfishEntity() { super(null, null); }
 
-    @ModifyReturnValue(method = "method_6591(Lnet/minecraft/entity/LivingEntity;)Z", at = @At("RETURN"))
-    private static boolean unicopia_excludeSeaponysGrace(boolean result, LivingEntity entity) {
-        return result && !SeaponyGraceStatusEffect.hasGrace(entity);
+    @Inject(method = "method_6591(Lnet/minecraft/entity/LivingEntity;)Z", at = @At("HEAD"), cancellable = true)
+    private static void unicopia_excludeSeaponysGrace(LivingEntity entity, CallbackInfoReturnable<Boolean> info) {
+        if (SeaponyGraceStatusEffect.hasGrace(entity)) {
+            info.setReturnValue(false);
+        }
     }
 }