diff --git a/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/type/Image.java b/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/type/Image.java
index 4002374d0d..5ff48432ea 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/type/Image.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/type/Image.java
@@ -91,7 +91,7 @@ public class Image extends MappedObject {
 	 * @return the image OS
 	 */
 	public String getOs() {
-		return (!StringUtils.hasText(this.os)) ? "linux" : this.os;
+		return (StringUtils.hasText(this.os)) ? this.os : "linux";
 	}
 
 	/**