diff --git a/escodegen.js b/escodegen.js
index 82417cd7..e10d2d64 100644
--- a/escodegen.js
+++ b/escodegen.js
@@ -2161,6 +2161,26 @@
             return join(result, fragment);
         },
 
+        FieldDefinition: function(expr, precedence, flags) {
+            var result;
+            if (expr['static']) {
+                result = ['static' + space];
+            }
+            else {
+                result = [];
+            }
+            var fragment = [
+                this.generatePropertyKey(expr.key, expr.computed),
+                space + '=' +space,
+                this.generateExpression(expr.value, Precedence.Assignment, E_TTT)
+            ];
+            return join(result, fragment);
+        },
+
+        PrivateName: function(expr, precedence, flags) {
+            return toSourceNodeWhenNeeded('#' + expr.name, expr);
+        },
+
         Property: function (expr, precedence, flags) {
             if (expr.kind === 'get' || expr.kind === 'set') {
                 return [
diff --git a/test/compare-acorn-es2019/class-field-declarations.expected.js b/test/compare-acorn-es2019/class-field-declarations.expected.js
new file mode 100644
index 00000000..7cfcdd45
--- /dev/null
+++ b/test/compare-acorn-es2019/class-field-declarations.expected.js
@@ -0,0 +1,7 @@
+class FieldDeclarations{
+    a = 1
+}
+class PrivateFields{
+    #a = 1
+}
+
diff --git a/test/compare-acorn-es2019/class-field-declarations.expected.min.js b/test/compare-acorn-es2019/class-field-declarations.expected.min.js
new file mode 100644
index 00000000..47742c23
--- /dev/null
+++ b/test/compare-acorn-es2019/class-field-declarations.expected.min.js
@@ -0,0 +1 @@
+class FieldDeclarations{a=1}class PrivateFields{#a=1}
\ No newline at end of file
diff --git a/test/compare-acorn-es2019/class-field-declarations.js b/test/compare-acorn-es2019/class-field-declarations.js
new file mode 100644
index 00000000..7cfcdd45
--- /dev/null
+++ b/test/compare-acorn-es2019/class-field-declarations.js
@@ -0,0 +1,7 @@
+class FieldDeclarations{
+    a = 1
+}
+class PrivateFields{
+    #a = 1
+}
+