diff --git a/code-generators/src/main/java/net/minestom/codegen/potion/PotionEffectGenerator.java b/code-generators/src/main/java/net/minestom/codegen/potion/PotionEffectGenerator.java
index 4116f8620..05423ba89 100644
--- a/code-generators/src/main/java/net/minestom/codegen/potion/PotionEffectGenerator.java
+++ b/code-generators/src/main/java/net/minestom/codegen/potion/PotionEffectGenerator.java
@@ -81,7 +81,7 @@ public final class PotionEffectGenerator extends MinestomCodeGenerator {
         potionEffectClass.addMethod(
                 MethodSpec.methodBuilder("getId")
                         .returns(TypeName.SHORT)
-                        .addStatement("return (short) ordinal()")
+                        .addStatement("return (short) (ordinal() + 1)")
                         .addModifiers(Modifier.PUBLIC)
                         .build()
         );
@@ -100,8 +100,8 @@ public final class PotionEffectGenerator extends MinestomCodeGenerator {
                         .returns(potionEffectClassName)
                         .addAnnotation(Nullable.class)
                         .addParameter(TypeName.SHORT, "id")
-                        .beginControlFlow("if(id >= 0 && id < VALUES.length)")
-                        .addStatement("return VALUES[id]")
+                        .beginControlFlow("if(id >= 0 && id < VALUES.length + 1)")
+                        .addStatement("return VALUES[id - 1]")
                         .endControlFlow()
                         .addStatement("return null")
                         .addModifiers(Modifier.PUBLIC, Modifier.STATIC)
diff --git a/src/autogenerated/java/net/minestom/server/potion/PotionEffect.java b/src/autogenerated/java/net/minestom/server/potion/PotionEffect.java
index 7cdcb463a..e69b8d332 100644
--- a/src/autogenerated/java/net/minestom/server/potion/PotionEffect.java
+++ b/src/autogenerated/java/net/minestom/server/potion/PotionEffect.java
@@ -92,7 +92,7 @@ public enum PotionEffect implements Keyed {
     }
 
     public short getId() {
-        return (short) ordinal();
+        return (short) (ordinal() + 1);
     }
 
     @NotNull
@@ -102,8 +102,8 @@ public enum PotionEffect implements Keyed {
 
     @Nullable
     public static PotionEffect fromId(short id) {
-        if(id >= 0 && id < VALUES.length) {
-            return VALUES[id];
+        if(id >= 0 && id < VALUES.length + 1) {
+            return VALUES[id - 1];
         }
         return null;
     }