diff --git a/core/src/main/java/com/alibaba/fastjson2/filter/ContextAutoTypeBeforeHandler.java b/core/src/main/java/com/alibaba/fastjson2/filter/ContextAutoTypeBeforeHandler.java
index e7b18406af..6b50f01409 100644
--- a/core/src/main/java/com/alibaba/fastjson2/filter/ContextAutoTypeBeforeHandler.java
+++ b/core/src/main/java/com/alibaba/fastjson2/filter/ContextAutoTypeBeforeHandler.java
@@ -46,6 +46,9 @@ public ContextAutoTypeBeforeHandler(String... acceptNames) {
             long hashCode = MAGIC_HASH_CODE;
             for (int j = 0; j < name.length(); ++j) {
                 char ch = name.charAt(j);
+                if (ch == '$') {
+                    ch = '.';
+                }
                 hashCode ^= ch;
                 hashCode *= MAGIC_PRIME;
             }
diff --git a/core/src/test/java/com/alibaba/fastjson2/issues/Issue750.java b/core/src/test/java/com/alibaba/fastjson2/issues/Issue750.java
new file mode 100644
index 0000000000..f9d0c10280
--- /dev/null
+++ b/core/src/test/java/com/alibaba/fastjson2/issues/Issue750.java
@@ -0,0 +1,24 @@
+package com.alibaba.fastjson2.issues;
+
+import com.alibaba.fastjson2.JSONB;
+import com.alibaba.fastjson2.JSONReader;
+import com.alibaba.fastjson2.JSONWriter;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class Issue750 {
+    @Test
+    public void test() {
+        Bean bean = new Bean();
+        bean.id = 123;
+
+        byte[] bytes = JSONB.toBytes(bean, JSONWriter.Feature.WriteClassName);
+        Bean bean1 = (Bean) JSONB.parseObject(bytes, Object.class, JSONReader.autoTypeFilter(Bean.class));
+        assertEquals(bean.id, bean1.id);
+    }
+
+    public static class Bean {
+        public int id;
+    }
+}