diff --git a/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/VertxHttpRecorder.java b/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/VertxHttpRecorder.java
index a0f973be8b94b6..d8d4a28e3ba105 100644
--- a/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/VertxHttpRecorder.java
+++ b/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/VertxHttpRecorder.java
@@ -1187,8 +1187,10 @@ public void handle(AsyncResult<HttpServer> event) {
 
                         if (https) {
                             actualHttpsPort = actualPort;
+                            validateHttpPorts(actualHttpPort, actualHttpsPort);
                         } else {
                             actualHttpPort = actualPort;
+                            validateHttpPorts(actualHttpPort, actualHttpsPort);
                         }
                         if (actualPort != options.getPort()) {
                             // Override quarkus.http(s)?.(test-)?port
@@ -1220,6 +1222,12 @@ public void handle(AsyncResult<HttpServer> event) {
 
                     }
                 }
+
+                private static void validateHttpPorts(int httpPort, int httpsPort) {
+                    if (httpsPort == httpPort) {
+                        throw new IllegalArgumentException("Both http and https servers started on port " + httpPort);
+                    }
+                }
             });
         }