diff --git a/lib/strdup.c b/lib/strdup.c
index e16e08a727749024ec612db9fea2e9888b30d148..7807e3028ca95bd8697ff029c0c3e8aa1a043ead 100644
--- a/lib/strdup.c
+++ b/lib/strdup.c
@@ -38,7 +38,7 @@ char *curlx_strdup(const char *str)
   if (!newstr)
     return (char *)NULL;
 
-  strcpy(newstr,str);
+  memcpy(newstr,str,(len+1)*sizeof(char));
 
   return newstr;