diff --git a/core/deployment/src/main/java/io/quarkus/deployment/steps/BannerProcessor.java b/core/deployment/src/main/java/io/quarkus/deployment/steps/BannerProcessor.java
index c30633dccaed2..0b6c800271d9c 100644
--- a/core/deployment/src/main/java/io/quarkus/deployment/steps/BannerProcessor.java
+++ b/core/deployment/src/main/java/io/quarkus/deployment/steps/BannerProcessor.java
@@ -1,12 +1,11 @@
 package io.quarkus.deployment.steps;
 
+import java.io.File;
 import java.io.IOException;
 import java.io.UncheckedIOException;
-import java.net.URI;
-import java.net.URISyntaxException;
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
-import java.nio.file.Paths;
+import java.nio.file.NoSuchFileException;
 import java.util.AbstractMap;
 import java.util.Enumeration;
 import java.util.Map;
@@ -103,7 +102,7 @@ private Map.Entry<URL, Boolean> getBanner(BannerConfig config) throws IOExceptio
         }
     }
 
-    private boolean isQuarkusCoreBanner(URL url) throws IOException {
+    protected boolean isQuarkusCoreBanner(URL url) throws IOException {
         if (!"jar".equals(url.getProtocol())) {
             return false;
         }
@@ -114,9 +113,9 @@ private boolean isQuarkusCoreBanner(URL url) throws IOException {
         // We determine whether the banner is the default by checking to see if the jar that contains it also
         // contains this class. This way although somewhat complicated guarantees that any rename of artifacts
         // won't affect the check
-        try (JarFile jarFile = new JarFile(Paths.get(new URI(jarPath)).toFile())) {
+        try (JarFile jarFile = new JarFile(new File(jarPath))) {
             return jarFile.getJarEntry(thisClassName.replace('.', '/') + ".class") != null;
-        } catch (URISyntaxException e) {
+        } catch (NoSuchFileException e) {
             return false;
         }
     }
diff --git a/core/deployment/src/test/java/io/quarkus/deployment/pkg/steps/BannerProcessorTest.java b/core/deployment/src/test/java/io/quarkus/deployment/pkg/steps/BannerProcessorTest.java
new file mode 100644
index 0000000000000..8b8234d1368ff
--- /dev/null
+++ b/core/deployment/src/test/java/io/quarkus/deployment/pkg/steps/BannerProcessorTest.java
@@ -0,0 +1,32 @@
+package io.quarkus.deployment.pkg.steps;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.net.URL;
+import java.nio.file.Paths;
+
+import org.assertj.core.util.Files;
+import org.junit.jupiter.api.Test;
+
+import io.quarkus.deployment.steps.BannerProcessor;
+
+public class BannerProcessorTest {
+
+    class MyBannerProcessor extends BannerProcessor {
+        public boolean test(String file) throws Exception {
+            return this.isQuarkusCoreBanner(new URL("jar", null, 0, file));
+        }
+    }
+
+    @Test
+    public void checkQuarkusCoreBannerOnFilesystemWithSpecialCharacters() throws Exception {
+        MyBannerProcessor processor = new MyBannerProcessor();
+
+        assertFalse(processor.test(Paths.get("tmp", "Descărcări", "test", "something!").toFile().getAbsolutePath()));
+        assertFalse(processor.test(Paths.get(Files.currentFolder().getAbsolutePath(), "src", "test", "resources", "test",
+                "Descărcări", "without-class.jar!").toFile().getAbsolutePath()));
+        assertTrue(processor.test(Paths.get(Files.currentFolder().getAbsolutePath(), "src", "test", "resources", "test",
+                "Descărcări", "with-class.jar!").toFile().getAbsolutePath()));
+    }
+}
diff --git "a/core/deployment/src/test/resources/test/Desc\304\203rc\304\203ri/with-class.jar" "b/core/deployment/src/test/resources/test/Desc\304\203rc\304\203ri/with-class.jar"
new file mode 100644
index 0000000000000..7cc7355144239
Binary files /dev/null and "b/core/deployment/src/test/resources/test/Desc\304\203rc\304\203ri/with-class.jar" differ
diff --git "a/core/deployment/src/test/resources/test/Desc\304\203rc\304\203ri/without-class.jar" "b/core/deployment/src/test/resources/test/Desc\304\203rc\304\203ri/without-class.jar"
new file mode 100644
index 0000000000000..df010a065473c
Binary files /dev/null and "b/core/deployment/src/test/resources/test/Desc\304\203rc\304\203ri/without-class.jar" differ