diff --git a/libzipfile/centraldir.c b/libzipfile/centraldir.c
index 0391c099..0e264a34 100644
--- a/libzipfile/centraldir.c
+++ b/libzipfile/centraldir.c
@@ -233,7 +233,7 @@ read_central_dir(Zipfile *file)
     len = (buf+bufsize)-p;
     for (i=0; i < file->totalEntryCount; i++) {
         Zipentry* entry = malloc(sizeof(Zipentry));
-        memset(entry, sizeof(Zipentry), 0);
+        memset(entry, 0, sizeof(Zipentry));
 
         err = read_central_directory_entry(file, entry, &p, &len);
         if (err != 0) {