diff --git a/test/test_remove_common_prefix.py b/test/test_remove_common_prefix.py
index c956d9d..da15803 100644
--- a/test/test_remove_common_prefix.py
+++ b/test/test_remove_common_prefix.py
@@ -2,7 +2,7 @@ import re
 
 
 def removepre(filename):
-    match = re.search(r"^(\d+)\s+\d*(.+?)\.(.*$)", filename.strip())
+    match = re.search(r"^[pP]?(\d+)\s+\d*(.+?)\.(.*$)", filename.strip())
     new_filename = filename
     if match:
         num = match.group(1)
@@ -26,4 +26,4 @@ if __name__ == "__main__":
     removepre(" 18 色风车.mp3")
     removepre(" 18 18 你好.mp3")
     removepre(" 18 18 我好.mp3")
-    removepre("09 009. 梁静茹-亲亲.mp3")
+    removepre("p09 009. 梁静茹-亲亲.mp3")
diff --git a/xiaomusic/utils.py b/xiaomusic/utils.py
index bc3c503..5778cac 100644
--- a/xiaomusic/utils.py
+++ b/xiaomusic/utils.py
@@ -983,7 +983,7 @@ def remove_common_prefix(directory):
 
     log.info(f'Common prefix identified: "{common_prefix}"')
 
-    pattern = re.compile(r"^(\d+)\s+\d*(.+?)\.(.*$)")
+    pattern = re.compile(r"^[pP]?(\d+)\s+\d*(.+?)\.(.*$)")
     for filename in files:
         if filename == common_prefix:
             continue