diff --git a/src/Makefile.am b/src/Makefile.am
index 9c77bb41..a205c4d1 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -56,6 +56,7 @@ wmaker_SOURCES = 	\
 	pixmap.c \
 	pixmap.h \
 	placement.c \
+	placement.h \
 	properties.c \
 	properties.h \
 	resources.c \
diff --git a/src/actions.c b/src/actions.c
index 65218707..207ce4f6 100644
--- a/src/actions.c
+++ b/src/actions.c
@@ -46,6 +46,7 @@
 #include "workspace.h"
 #include "xinerama.h"
 #include "usermenu.h"
+#include "placement.h"
 
 /****** Global Variables ******/
 
@@ -55,7 +56,6 @@ extern Time LastFocusChange;
 extern WPreferences wPreferences;
 extern Atom _XA_WM_TAKE_FOCUS;
 extern void ProcessPendingEvents();
-extern int calcIntersectionLength(int p1, int l1, int p2, int l2);
 
 static void find_Maximus_geometry(WWindow *wwin, WArea usableArea, int *new_x, int *new_y,
 				  unsigned int *new_width, unsigned int *new_height);
diff --git a/src/appicon.c b/src/appicon.c
index 573344c2..322ee619 100644
--- a/src/appicon.c
+++ b/src/appicon.c
@@ -47,6 +47,7 @@
 #include "dialog.h"
 #include "xinerama.h"
 #include "client.h"
+#include "placement.h"
 #ifdef XDND
 #include "xdnd.h"
 #endif
diff --git a/src/dock.c b/src/dock.c
index 21d6aeec..0140bd19 100644
--- a/src/dock.c
+++ b/src/dock.c
@@ -54,6 +54,7 @@
 #include "framewin.h"
 #include "superfluous.h"
 #include "xinerama.h"
+#include "placement.h"
 
 /**** Local variables ****/
 #define CLIP_REWIND       1
diff --git a/src/funcs.h b/src/funcs.h
index 0d063b03..3902d0b6 100644
--- a/src/funcs.h
+++ b/src/funcs.h
@@ -40,12 +40,9 @@ void OpenWindowMenu2(WWindow *wwin, int x, int y, int keyboard);
 void OpenMiniwindowMenu(WWindow *wwin, int x, int y);
 void CloseWindowMenu(WScreen *scr);
 void DestroyWindowMenu(WScreen *scr);
-void PlaceIcon(WScreen *scr, int *x_ret, int *y_ret, int head);
 void StartWindozeCycle(WWindow *wwin, XEvent *event, Bool next, Bool class_only);
 void SendHelperMessage(WScreen *scr, char type, int workspace, char *msg);
 void UnescapeWM_CLASS(char *str, char **name, char **class);
-void PlaceWindow(WWindow *wwin, int *x_ret, int *y_ret,
-                 unsigned int width, unsigned int height);
 
 void ParseWindowName(WMPropList *value, char **winstance, char **wclass,
                      char *where);
@@ -60,9 +57,6 @@ WMagicNumber wAddDeathHandler(pid_t pid, WDeathHandler *callback, void *cdata);
 Pixmap LoadIcon(WScreen *scr, char *path, char *mask, int title_height);
 
 
-int calcIntersectionArea(int x1, int y1, int w1, int h1,
-                         int x2, int y2, int w2, int h2);
-
 char * StrConcatDot(char *a, char *b);
 char * ExpandOptions(WScreen *scr, char *cmdline);
 char * ShrinkString(WMFont *font, char *string, int width);
diff --git a/src/placement.h b/src/placement.h
new file mode 100644
index 00000000..5f7a907f
--- /dev/null
+++ b/src/placement.h
@@ -0,0 +1,34 @@
+/* placement.h - window and icon placement on screen
+ *
+ *  Window Maker window manager
+ *
+ *  Copyright (c) 1997-2003 Alfredo K. Kojima
+ *  Copyright (c) 2013 Window Maker Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+void PlaceIcon(WScreen *scr, int *x_ret, int *y_ret, int head);
+
+/* Computes the intersecting length of two line sections */
+int calcIntersectionLength(int p1, int l1, int p2, int l2);
+
+/* Computes the intersecting area of two rectangles */
+int calcIntersectionArea(int x1, int y1, int w1, int h1, int x2, int y2, int w2, int h2);
+
+void PlaceWindow(WWindow *wwin, int *x_ret, int *y_ret, unsigned width, unsigned height);
+
+/* Set the points x and y inside the screen */
+void get_right_position_on_screen(WScreen *scr, int *x, int *y, int size_x, int size_y);
diff --git a/src/window.c b/src/window.c
index affafcfb..c227b4cd 100644
--- a/src/window.c
+++ b/src/window.c
@@ -60,6 +60,7 @@
 #include "appicon.h"
 #include "superfluous.h"
 #include "rootmenu.h"
+#include "placement.h"
 
 #ifdef MWM_HINTS
 # include "motif.h"
diff --git a/src/xinerama.c b/src/xinerama.c
index 4bd9ca44..f9fe31e7 100644
--- a/src/xinerama.c
+++ b/src/xinerama.c
@@ -25,7 +25,7 @@
 #include "screen.h"
 #include "window.h"
 #include "framewin.h"
-#include "funcs.h"
+#include "placement.h"
 
 #ifdef XINERAMA
 # ifdef SOLARIS_XINERAMA	/* sucks */