diff --git a/dubbo-common/src/main/java/org/apache/dubbo/common/io/Bytes.java b/dubbo-common/src/main/java/org/apache/dubbo/common/io/Bytes.java
index 263e7b9f67..5112dcf73a 100644
--- a/dubbo-common/src/main/java/org/apache/dubbo/common/io/Bytes.java
+++ b/dubbo-common/src/main/java/org/apache/dubbo/common/io/Bytes.java
@@ -730,8 +730,12 @@ public class Bytes {
             char pc = code[64];
             if (str.charAt(off + len - 2) == pc) {
                 size -= 2;
+                --num;
+                rem = 2;
             } else if (str.charAt(off + len - 1) == pc) {
                 size--;
+                --num;
+                rem = 3;
             }
         } else {
             if (rem == 2) {
diff --git a/dubbo-common/src/test/java/org/apache/dubbo/common/io/BytesTest.java b/dubbo-common/src/test/java/org/apache/dubbo/common/io/BytesTest.java
index 71b915c1e4..cae1a834ce 100644
--- a/dubbo-common/src/test/java/org/apache/dubbo/common/io/BytesTest.java
+++ b/dubbo-common/src/test/java/org/apache/dubbo/common/io/BytesTest.java
@@ -90,6 +90,14 @@ public class BytesTest {
         assertThat(bytes2, is(out2));
     }
 
+    @Test
+    public void testBase642bCharArrCall() {
+        byte[] stringCall = Bytes.base642bytes("ZHViYm8=", C64);
+        byte[] charArrCall = Bytes.base642bytes("ZHViYm8=", C64.toCharArray());
+
+        assertThat(stringCall, is(charArrCall));
+    }
+
     @Test
     public void testHex() {
         String str = Bytes.bytes2hex(b1);