diff --git a/implementation/src/main/java/io/smallrye/config/SmallRyeConfigBuilder.java b/implementation/src/main/java/io/smallrye/config/SmallRyeConfigBuilder.java
index 00cc5870e..a71aacf57 100644
--- a/implementation/src/main/java/io/smallrye/config/SmallRyeConfigBuilder.java
+++ b/implementation/src/main/java/io/smallrye/config/SmallRyeConfigBuilder.java
@@ -763,7 +763,7 @@ public SmallRyeConfig build() {
         customizers.sort(new Comparator<>() {
             @Override
             public int compare(SmallRyeConfigBuilderCustomizer o1, SmallRyeConfigBuilderCustomizer o2) {
-                return o1.priority() - o2.priority();
+                return Integer.compare(o1.priority(), o2.priority());
             }
         });
         for (SmallRyeConfigBuilderCustomizer customizer : customizers) {