diff --git a/src/configuration.ts b/src/configuration.ts
index 714590b..00c0b2a 100644
--- a/src/configuration.ts
+++ b/src/configuration.ts
@@ -134,7 +134,7 @@ export class StackConfig {
     // Look up stack-specific property, failing over to stage if not overridden for this stack
     const value =
       this.stack?.[name] ?? this.stage.getProperty(name) ?? default_value
-    if (value) {
+    if (value !== undefined && value !== null) {
       return value
     }
     throw new Error(`Missing value ${name} for stack`)