diff --git a/CHANGELOG.md b/CHANGELOG.md
index 63b379e7..c592137f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,5 @@
 
+ * Fix `Generator` flakiness caused by calls to `Class.getDeclaredMethods()` ([pull #784](https://github.com/bytedeco/javacpp/pull/784))
  * Add minimal mappings for `std::chrono` from C++11 ([pull #766](https://github.com/bytedeco/javacpp/pull/766))
  * Let `Parser` annotate Java constructors with `@Deprecated` when appropriate ([pull #757](https://github.com/bytedeco/javacpp/pull/757))
  * Add to `InfoMap.defaults` more names that are reserved in Java, but not in C++ ([pull #757](https://github.com/bytedeco/javacpp/pull/757))
diff --git a/src/main/java/org/bytedeco/javacpp/tools/Generator.java b/src/main/java/org/bytedeco/javacpp/tools/Generator.java
index e703ca31..cb41b19a 100644
--- a/src/main/java/org/bytedeco/javacpp/tools/Generator.java
+++ b/src/main/java/org/bytedeco/javacpp/tools/Generator.java
@@ -2116,7 +2116,7 @@ boolean methods(Class<?> cls) {
             c = c.getSuperclass();
         }
         boolean[] callbackAllocators = new boolean[methods.length];
-        Method[] functionMethods = functionMethods(cls, callbackAllocators);
+        Method[] functionMethods = functionMethods(cls, methods, callbackAllocators);
         boolean firstCallback = true;
         for (int i = 0; i < methods.length; i++) {
             if (!Loader.checkPlatform(methods[i].getAnnotation(Platform.class), properties)) {
@@ -3636,11 +3636,10 @@ static String functionClassName(Class<?> cls) {
         return name != null ? name.value()[0] : "JavaCPP_" + mangle(cls.getName());
     }
 
-    static Method[] functionMethods(Class<?> cls, boolean[] callbackAllocators) {
+    static Method[] functionMethods(Class<?> cls, Method[] methods, boolean[] callbackAllocators) {
         if (!FunctionPointer.class.isAssignableFrom(cls)) {
             return null;
         }
-        Method[] methods = cls.getDeclaredMethods();
         Method[] functionMethods = new Method[3];
         for (int i = 0; i < methods.length; i++) {
             String methodName = methods[i].getName();
@@ -4386,7 +4385,7 @@ String[] cppTypeName(Class<?> type, Annotation[] annotations) {
         } else if (type.isPrimitive()) {
             prefix = type.getName();
         } else if (FunctionPointer.class.isAssignableFrom(type)) {
-            Method[] functionMethods = functionMethods(type, null);
+            Method[] functionMethods = functionMethods(type, type.getDeclaredMethods(), null);
             String[] prefixSuffix = cppFunctionTypeName(functionMethods);
             if (prefixSuffix != null) {
                 return prefixSuffix;