diff --git a/src/client.c b/src/client.c
index 1f55ff2..dda1f92 100644
--- a/src/client.c
+++ b/src/client.c
@@ -20,6 +20,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "client.h"
 #include "util.h"
 #include "wm.h"
+#include <X11/Xlib.h>
 #include <assert.h>
 #include <stdio.h>
 #include <string.h>
@@ -74,6 +75,7 @@ Client* wm_client_create(Wm *wm, Window w)
     c->hidden = true;
     c->is_floating = false;
     c->name = NULL;
+    c->is_pid_set = false;
 
     if (xtp.value) {
         strln = strlen((char*)xtp.value);
@@ -88,8 +90,21 @@ Client* wm_client_create(Wm *wm, Window w)
     wm_client_set_atom(wm, c, "_NET_WM_DESKTOP", (unsigned char*)&c->ws->index,
                        XA_CARDINAL, 1);
 
+    unsigned char *prop_ret = NULL;
+    unsigned long nitems_ret;
+    Atom type;
+    bool is_normal = false;
 
+    type = wm_client_get_atom(wm, c, "_NET_WM_PID", &prop_ret, &nitems_ret);
+    if (!nitems_ret || !prop_ret) goto ret;
+
+    c->pid = *((int*)prop_ret);
+    DEBUG_PRINT("pid: %d\n", c->pid);
+    c->is_pid_set = true;
+
+ret:
     XFree(xtp.value);
+    if (prop_ret) XFree(prop_ret);
     return c;
 }
 
@@ -308,11 +323,6 @@ Atom wm_client_get_atom(Wm *wm, Client *c, const char *name, unsigned char **ato
     DEBUG_PRINT("actual format return: %d\n", format_ret)
     DEBUG_PRINT("actual number of items return: %ld\n", *nitems_ret)
     DEBUG_PRINT("bytes remaining: %ld\n", *nitems_ret)
-    for (int i = 0; i < *nitems_ret; i++) {
-        char *atom_name = XGetAtomName(wm->display, ((Atom*)*atom_ret)[i]);
-        printf("property return str: %s\n", atom_name);
-        XFree(atom_name);
-    }
 
     return type_ret;
 }
diff --git a/src/client.h b/src/client.h
index 448e577..b17c65c 100644
--- a/src/client.h
+++ b/src/client.h
@@ -44,6 +44,8 @@ struct Client {
     bool focused;
     bool has_border;
     bool is_floating;
+    pid_t pid;
+    bool is_pid_set;
 };
 
 XWindowChanges wm_client_to_xwchanges(Client *c);