diff --git a/Libraries/LibC/string.cpp b/Libraries/LibC/string.cpp
index cadd9669d6..4d25cd8fd2 100644
--- a/Libraries/LibC/string.cpp
+++ b/Libraries/LibC/string.cpp
@@ -94,13 +94,14 @@ char* strdup(const char* str)
 {
     size_t len = strlen(str);
     char* new_str = (char*)malloc(len + 1);
-    strcpy(new_str, str);
+    memcpy(new_str, str, len);
+    new_str[len] = '\0';
     return new_str;
 }
 
 char* strndup(const char* str, size_t maxlen)
 {
-    size_t len = min(strlen(str), maxlen);
+    size_t len = strnlen(str, maxlen);
     char* new_str = (char*)malloc(len + 1);
     memcpy(new_str, str, len);
     new_str[len] = 0;