diff --git a/extensions/smallrye-opentracing/runtime/src/main/java/io/quarkus/smallrye/opentracing/runtime/graal/Target_org_jboss_resteasy_microprofile_config_FilterConfigSource.java b/extensions/smallrye-opentracing/runtime/src/main/java/io/quarkus/smallrye/opentracing/runtime/graal/Target_org_jboss_resteasy_microprofile_config_FilterConfigSource.java
index e1c6fb2877a35..573b4d6f43276 100644
--- a/extensions/smallrye-opentracing/runtime/src/main/java/io/quarkus/smallrye/opentracing/runtime/graal/Target_org_jboss_resteasy_microprofile_config_FilterConfigSource.java
+++ b/extensions/smallrye-opentracing/runtime/src/main/java/io/quarkus/smallrye/opentracing/runtime/graal/Target_org_jboss_resteasy_microprofile_config_FilterConfigSource.java
@@ -1,6 +1,6 @@
 package io.quarkus.smallrye.opentracing.runtime.graal;
 
-import org.jboss.resteasy.microprofile.config.FilterConfigSource;
+import java.util.function.BooleanSupplier;
 
 import com.oracle.svm.core.annotate.Alias;
 import com.oracle.svm.core.annotate.RecomputeFieldValue;
@@ -9,9 +9,14 @@
 /**
  * see {@link Target_org_jboss_resteasy_microprofile_config_ServletContextConfigSource}
  */
-@TargetClass(value = FilterConfigSource.class, onlyWith = UndertowMissing.class)
+@TargetClass(className = Target_org_jboss_resteasy_microprofile_config_FilterConfigSource.FILTER_CONFIG_SOURCE_NAME, onlyWith = {
+        UndertowMissing.class,
+        Target_org_jboss_resteasy_microprofile_config_FilterConfigSource.FilterConfigSourceIsLoaded.class
+})
 final class Target_org_jboss_resteasy_microprofile_config_FilterConfigSource {
 
+    static final String FILTER_CONFIG_SOURCE_NAME = "org.jboss.resteasy.microprofile.config.FilterConfigSource";
+
     @Alias
     @RecomputeFieldValue(kind = RecomputeFieldValue.Kind.FromAlias)
     private static boolean SERVLET_AVAILABLE = false;
@@ -19,4 +24,17 @@ final class Target_org_jboss_resteasy_microprofile_config_FilterConfigSource {
     @Alias
     @RecomputeFieldValue(kind = RecomputeFieldValue.Kind.Reset)
     private static Class<?> clazz;
+
+    static class FilterConfigSourceIsLoaded implements BooleanSupplier {
+
+        @Override
+        public boolean getAsBoolean() {
+            try {
+                Class.forName(FILTER_CONFIG_SOURCE_NAME);
+                return true;
+            } catch (ClassNotFoundException e) {
+                return false;
+            }
+        }
+    }
 }
diff --git a/extensions/smallrye-opentracing/runtime/src/main/java/io/quarkus/smallrye/opentracing/runtime/graal/Target_org_jboss_resteasy_microprofile_config_ServletConfigSource.java b/extensions/smallrye-opentracing/runtime/src/main/java/io/quarkus/smallrye/opentracing/runtime/graal/Target_org_jboss_resteasy_microprofile_config_ServletConfigSource.java
index 31031035b53bb..510b17559809d 100644
--- a/extensions/smallrye-opentracing/runtime/src/main/java/io/quarkus/smallrye/opentracing/runtime/graal/Target_org_jboss_resteasy_microprofile_config_ServletConfigSource.java
+++ b/extensions/smallrye-opentracing/runtime/src/main/java/io/quarkus/smallrye/opentracing/runtime/graal/Target_org_jboss_resteasy_microprofile_config_ServletConfigSource.java
@@ -1,6 +1,6 @@
 package io.quarkus.smallrye.opentracing.runtime.graal;
 
-import org.jboss.resteasy.microprofile.config.ServletConfigSource;
+import java.util.function.BooleanSupplier;
 
 import com.oracle.svm.core.annotate.Alias;
 import com.oracle.svm.core.annotate.RecomputeFieldValue;
@@ -9,9 +9,14 @@
 /**
  * see {@link Target_org_jboss_resteasy_microprofile_config_ServletContextConfigSource}
  */
-@TargetClass(value = ServletConfigSource.class, onlyWith = UndertowMissing.class)
+@TargetClass(className = Target_org_jboss_resteasy_microprofile_config_ServletConfigSource.SERVLET_CONFIG_SOURCE_NAME, onlyWith = {
+        UndertowMissing.class,
+        Target_org_jboss_resteasy_microprofile_config_ServletConfigSource.ServletConfigSourceIsLoaded.class,
+})
 final class Target_org_jboss_resteasy_microprofile_config_ServletConfigSource {
 
+    static final String SERVLET_CONFIG_SOURCE_NAME = "org.jboss.resteasy.microprofile.config.ServletConfigSource";
+
     @Alias
     @RecomputeFieldValue(kind = RecomputeFieldValue.Kind.FromAlias)
     private static boolean SERVLET_AVAILABLE = false;
@@ -19,4 +24,17 @@ final class Target_org_jboss_resteasy_microprofile_config_ServletConfigSource {
     @Alias
     @RecomputeFieldValue(kind = RecomputeFieldValue.Kind.Reset)
     private static Class<?> clazz;
+
+    static class ServletConfigSourceIsLoaded implements BooleanSupplier {
+
+        @Override
+        public boolean getAsBoolean() {
+            try {
+                Class.forName(SERVLET_CONFIG_SOURCE_NAME);
+                return true;
+            } catch (ClassNotFoundException e) {
+                return false;
+            }
+        }
+    }
 }
diff --git a/extensions/smallrye-opentracing/runtime/src/main/java/io/quarkus/smallrye/opentracing/runtime/graal/Target_org_jboss_resteasy_microprofile_config_ServletContextConfigSource.java b/extensions/smallrye-opentracing/runtime/src/main/java/io/quarkus/smallrye/opentracing/runtime/graal/Target_org_jboss_resteasy_microprofile_config_ServletContextConfigSource.java
index 34f9c4d82c402..ce6fa2809313d 100644
--- a/extensions/smallrye-opentracing/runtime/src/main/java/io/quarkus/smallrye/opentracing/runtime/graal/Target_org_jboss_resteasy_microprofile_config_ServletContextConfigSource.java
+++ b/extensions/smallrye-opentracing/runtime/src/main/java/io/quarkus/smallrye/opentracing/runtime/graal/Target_org_jboss_resteasy_microprofile_config_ServletContextConfigSource.java
@@ -1,5 +1,7 @@
 package io.quarkus.smallrye.opentracing.runtime.graal;
 
+import java.util.function.BooleanSupplier;
+
 import org.jboss.resteasy.microprofile.config.ServletContextConfigSource;
 import org.jboss.resteasy.microprofile.config.ServletContextConfigSourceImpl;
 
@@ -17,10 +19,20 @@
  * GraalVM failing because the class cannot be instantiated.
  *
  * See https://github.com/quarkusio/quarkus/issues/9086
+ *
+ * Furthermore, we only reference the class by its name as not avoid having GraalVM fail if the class is not on classpath
+ * at all.
+ *
+ * See https://github.com/quarkusio/quarkus/issues/14876
  */
-@TargetClass(value = ServletContextConfigSource.class, onlyWith = UndertowMissing.class)
+@TargetClass(className = Target_org_jboss_resteasy_microprofile_config_ServletContextConfigSource.SERVLET_CONTEXT_CONFIG_SOURCE_NAME, onlyWith = {
+        UndertowMissing.class,
+        Target_org_jboss_resteasy_microprofile_config_ServletContextConfigSource.ServletContextConfigSourceIsLoaded.class
+})
 final class Target_org_jboss_resteasy_microprofile_config_ServletContextConfigSource {
 
+    static final String SERVLET_CONTEXT_CONFIG_SOURCE_NAME = "org.jboss.resteasy.microprofile.config.ServletContextConfigSource";
+
     @Alias
     @RecomputeFieldValue(kind = RecomputeFieldValue.Kind.FromAlias)
     private static boolean SERVLET_AVAILABLE = false;
@@ -28,4 +40,16 @@ final class Target_org_jboss_resteasy_microprofile_config_ServletContextConfigSo
     @Alias
     @RecomputeFieldValue(kind = RecomputeFieldValue.Kind.Reset)
     private static Class<?> clazz;
+
+    static class ServletContextConfigSourceIsLoaded implements BooleanSupplier {
+        @Override
+        public boolean getAsBoolean() {
+            try {
+                Class.forName(SERVLET_CONTEXT_CONFIG_SOURCE_NAME);
+                return true;
+            } catch (ClassNotFoundException e) {
+                return false;
+            }
+        }
+    }
 }