diff --git a/i3-dump-log/main.c b/i3-dump-log/main.c
index 4f15f26f..ba60d396 100644
--- a/i3-dump-log/main.c
+++ b/i3-dump-log/main.c
@@ -246,8 +246,8 @@ int main(int argc, char *argv[]) {
     sigaction(SIGINT, &action, NULL);
 
     /* Since pthread_cond_wait() expects a mutex, we need to provide one.
-         * To not lock i3 (that’s bad, mhkay?) we just define one outside of
-         * the shared memory. */
+     * To not lock i3 (that’s bad, mhkay?) we just define one outside of
+     * the shared memory. */
     pthread_mutex_t dummy_mutex = PTHREAD_MUTEX_INITIALIZER;
     pthread_mutex_lock(&dummy_mutex);
     while (!interrupted) {
diff --git a/include/ipc.h b/include/ipc.h
index a608ef56..8ea9fd2e 100644
--- a/include/ipc.h
+++ b/include/ipc.h
@@ -145,9 +145,9 @@ void ipc_send_barconfig_update_event(Barconfig *barconfig);
 void ipc_send_binding_event(const char *event_type, Binding *bind);
 
 /**
-  * Set the maximum duration that we allow for a connection with an unwriteable
-  * socket.
-  */
+ * Set the maximum duration that we allow for a connection with an unwriteable
+ * socket.
+ */
 void ipc_set_kill_timeout(ev_tstamp new);
 
 /**
diff --git a/include/xcb.h b/include/xcb.h
index 32110c7d..36cc6fb9 100644
--- a/include/xcb.h
+++ b/include/xcb.h
@@ -49,8 +49,8 @@
 #define ROOT_EVENT_MASK (XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |                                       \
                          XCB_EVENT_MASK_BUTTON_PRESS |                                                \
                          XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video \
-                                                                  projector), the root window gets a  \
-                                                                  ConfigureNotify */                  \
+                                                            * projector), the root window gets a      \
+                                                            * ConfigureNotify */                      \
                          XCB_EVENT_MASK_POINTER_MOTION |                                              \
                          XCB_EVENT_MASK_PROPERTY_CHANGE |                                             \
                          XCB_EVENT_MASK_FOCUS_CHANGE |                                                \
diff --git a/libi3/get_exe_path.c b/libi3/get_exe_path.c
index e933f5b6..430fb2e0 100644
--- a/libi3/get_exe_path.c
+++ b/libi3/get_exe_path.c
@@ -91,7 +91,7 @@ char *get_exe_path(const char *argv0) {
         free(destpath);
         sasprintf(&destpath, "%s/%s", component, argv0);
         /* Of course this is not 100% equivalent to actually exec()ing the
-		 * binary, but meh. */
+         * binary, but meh. */
         if (access(destpath, X_OK) == 0) {
             free(path);
             free(tmp);
diff --git a/src/manage.c b/src/manage.c
index b223d0f7..726c714c 100644
--- a/src/manage.c
+++ b/src/manage.c
@@ -29,7 +29,7 @@ static xcb_window_t _match_depth(i3Window *win, Con *con) {
 }
 
 /*
- * Remove all match criteria, the first swallowed window wins. 
+ * Remove all match criteria, the first swallowed window wins.
  *
  */
 static void _remove_matches(Con *con) {
diff --git a/testcases/inject_randr1.5.c b/testcases/inject_randr1.5.c
index 29b6a33d..819c029b 100644
--- a/testcases/inject_randr1.5.c
+++ b/testcases/inject_randr1.5.c
@@ -59,7 +59,7 @@ struct connstate {
     ev_io *clientw;
 
     /* serverw is a libev watcher for the connection to X11 which we initiated
-	 * on behalf of the client. */
+     * on behalf of the client. */
     ev_io *serverw;
 
     /* sequence is the client-side sequence number counter. In X11’s wire