diff --git a/src/main/kotlin/dev/nextftc/bindings/Button.kt b/src/main/kotlin/dev/nextftc/bindings/Button.kt
index 2f69d0c..4b025a5 100644
--- a/src/main/kotlin/dev/nextftc/bindings/Button.kt
+++ b/src/main/kotlin/dev/nextftc/bindings/Button.kt
@@ -68,7 +68,7 @@ class Button(private val valueSupplier: Supplier<Boolean>) : Supplier<Boolean> {
         class Named(val name: String?) : Layer
     }
 
-    private var value: Boolean = valueSupplier.get()
+    private var value: Boolean = false
     private var previousValue = value
 
     /**
diff --git a/src/main/kotlin/dev/nextftc/bindings/Variable.kt b/src/main/kotlin/dev/nextftc/bindings/Variable.kt
index d34d9d8..292bbe9 100644
--- a/src/main/kotlin/dev/nextftc/bindings/Variable.kt
+++ b/src/main/kotlin/dev/nextftc/bindings/Variable.kt
@@ -32,12 +32,12 @@ import java.util.function.Supplier
  * @see Range for creating a double variable with number-specific utilities.
  */
 open class Variable<T>(private val valueSupplier: Supplier<T>) : Supplier<T> {
-    private var value: T = valueSupplier.get()
+    private var value: T? = null
 
     /**
      * Gets the cached value of the variable. The cached value is updated when [update] is called.
      */
-    override fun get(): T = value
+    override fun get(): T = value ?: error("Variable not updated; call update() first")
 
     /**
      * Creates a new [Variable] that maps the value of this variable using the given [mapper] and registers it with