diff --git a/src/dbus.c b/src/dbus.c
index dc54b3e4..01f1d45e 100644
--- a/src/dbus.c
+++ b/src/dbus.c
@@ -803,19 +803,19 @@ static bool cdbus_process_win_get(session_t *ps, DBusMessage *msg) {
 
 	cdbus_m_win_get_do(frame_opacity, cdbus_reply_double);
 	if (!strcmp("left_width", target)) {
-		cdbus_reply_uint32(ps, msg, w->frame_extents.left);
+		cdbus_reply_int32(ps, msg, w->frame_extents.left);
 		return true;
 	}
 	if (!strcmp("right_width", target)) {
-		cdbus_reply_uint32(ps, msg, w->frame_extents.right);
+		cdbus_reply_int32(ps, msg, w->frame_extents.right);
 		return true;
 	}
 	if (!strcmp("top_width", target)) {
-		cdbus_reply_uint32(ps, msg, w->frame_extents.top);
+		cdbus_reply_int32(ps, msg, w->frame_extents.top);
 		return true;
 	}
 	if (!strcmp("bottom_width", target)) {
-		cdbus_reply_uint32(ps, msg, w->frame_extents.bottom);
+		cdbus_reply_int32(ps, msg, w->frame_extents.bottom);
 		return true;
 	}
 
diff --git a/src/render.c b/src/render.c
index 5ddbd686..074a2588 100644
--- a/src/render.c
+++ b/src/render.c
@@ -321,10 +321,10 @@ void paint_one(session_t *ps, win *w, const region_t *reg_paint) {
 	} else {
 		// Painting parameters
 		const margin_t extents = win_calc_frame_extents(w);
-		const auto t = (int)extents.top;
-		const auto l = (int)extents.left;
-		const auto b = (int)extents.bottom;
-		const auto r = (int)extents.right;
+		const auto t = extents.top;
+		const auto l = extents.left;
+		const auto b = extents.bottom;
+		const auto r = extents.right;
 
 #define COMP_BDR(cx, cy, cwid, chei)                                                     \
 	paint_region(ps, w, (cx), (cy), (cwid), (chei), w->frame_opacity * w->opacity,   \
diff --git a/src/types.h b/src/types.h
index f446833f..99807d0a 100644
--- a/src/types.h
+++ b/src/types.h
@@ -16,10 +16,10 @@ typedef enum {
 
 /// A structure representing margins around a rectangle.
 typedef struct {
-	unsigned int top;
-	unsigned int left;
-	unsigned int bottom;
-	unsigned int right;
+	int top;
+	int left;
+	int bottom;
+	int right;
 } margin_t;
 
 typedef uint32_t opacity_t;
diff --git a/src/win.c b/src/win.c
index c6eab854..de2fb185 100644
--- a/src/win.c
+++ b/src/win.c
@@ -121,10 +121,10 @@ static void win_get_region_local(const win *w, region_t *res) {
 void win_get_region_noframe_local(const win *w, region_t *res) {
 	const margin_t extents = win_calc_frame_extents(w);
 
-	int x = (int)extents.left;
-	int y = (int)extents.top;
-	int width = max2(w->g.width - (int)(extents.left + extents.right), 0);
-	int height = max2(w->g.height - (int)(extents.top + extents.bottom), 0);
+	int x = extents.left;
+	int y = extents.top;
+	int width = max2(w->g.width - (extents.left + extents.right), 0);
+	int height = max2(w->g.height - (extents.top + extents.bottom), 0);
 
 	pixman_region32_fini(res);
 	if (width > 0 && height > 0) {
@@ -141,13 +141,13 @@ void win_get_region_frame_local(const win *w, region_t *res) {
 	    res,
 	    (rect_t[]){
 	        // top
-	        {.x1 = 0, .y1 = 0, .x2 = w->g.width, .y2 = (int)extents.top},
+	        {.x1 = 0, .y1 = 0, .x2 = w->g.width, .y2 = extents.top},
 	        // bottom
-	        {.x1 = 0, .y1 = (int)(w->g.height - extents.bottom), .x2 = w->g.width, .y2 = w->g.height},
+	        {.x1 = 0, .y1 = w->g.height - extents.bottom, .x2 = w->g.width, .y2 = w->g.height},
 	        // left
-	        {.x1 = 0, .y1 = 0, .x2 = (int)extents.left, .y2 = w->g.height},
+	        {.x1 = 0, .y1 = 0, .x2 = extents.left, .y2 = w->g.height},
 	        // right
-	        {.x1 = (int)(w->g.width - extents.right), .y1 = 0, .x2 = w->g.width, .y2 = w->g.height},
+	        {.x1 = w->g.width - extents.right, .y1 = 0, .x2 = w->g.width, .y2 = w->g.height},
 	    },
 	    4);
 
@@ -1358,7 +1358,12 @@ void win_update_frame_extents(session_t *ps, win *w, xcb_window_t client) {
 	    wid_get_prop(ps, client, ps->atom_frame_extents, 4L, XCB_ATOM_CARDINAL, 32);
 
 	if (prop.nitems == 4) {
-		const uint32_t *const extents = prop.c32;
+		const int32_t extents[4] = {
+			to_int_checked(prop.c32[0]),
+			to_int_checked(prop.c32[1]),
+			to_int_checked(prop.c32[2]),
+			to_int_checked(prop.c32[3]),
+		};
 		const bool changed = w->frame_extents.left != extents[0] ||
 		                     w->frame_extents.right != extents[1] ||
 		                     w->frame_extents.top != extents[2] ||