diff --git a/src/frontends/xforms/FormGraphics.C b/src/frontends/xforms/FormGraphics.C
index dda36d298a..38866c2af4 100644
--- a/src/frontends/xforms/FormGraphics.C
+++ b/src/frontends/xforms/FormGraphics.C
@@ -578,7 +578,7 @@ ButtonPolicy::SMInput FormGraphics::input(FL_OBJECT * ob, long)
 
 		// the bb section
 	} else if (!controller().bbChanged &&
-		   (ob == bbox_->choice_bb_units ||
+		   (ob == bbox_->check_clip  || ob == bbox_->choice_bb_units ||
 		    ob == bbox_->input_bb_x0 || ob == bbox_->input_bb_y0 ||
 		    ob == bbox_->input_bb_x1 || ob == bbox_->input_bb_y1)) {
 		controller().bbChanged = true;
diff --git a/src/frontends/xforms/xformsGImage.C b/src/frontends/xforms/xformsGImage.C
index fadefb4c6f..ef0059e50b 100644
--- a/src/frontends/xforms/xformsGImage.C
+++ b/src/frontends/xforms/xformsGImage.C
@@ -261,10 +261,10 @@ void xformsGImage::clip(GParams const & params)
 		// Bounds are unchanged.
 		return;
 
-	int const xoffset_l = params.bb.xl;
-	int const xoffset_r = image_->w - params.bb.xr;
-	int const yoffset_t = image_->h - params.bb.yt;
-	int const yoffset_b = params.bb.yb;
+	int const xoffset_l = std::max(0, params.bb.xl);
+	int const xoffset_r = std::max(0, image_->w - params.bb.xr);
+	int const yoffset_t = std::max(0, image_->h - params.bb.yt);
+	int const yoffset_b = std::max(0, params.bb.yb);
 
 	flimage_crop(image_, xoffset_l, yoffset_t, xoffset_r, yoffset_b);
 }
diff --git a/src/graphics/GraphicsParams.C b/src/graphics/GraphicsParams.C
index b130623134..7a5a06c4e1 100644
--- a/src/graphics/GraphicsParams.C
+++ b/src/graphics/GraphicsParams.C
@@ -36,20 +36,22 @@ GParams::GParams(InsetGraphicsParams const & iparams, string const & filepath)
 		bb = iparams.bb;
 
 		// Get the original Bounding Box from the file
-		string const bb_orig_str = readBB_from_PSFile(filename);
-		if (!bb_orig_str.empty()) {
-			BoundingBox bb_orig;
-			bb_orig.xl = strToInt(token(bb_orig_str, ' ', 0));
-			bb_orig.yb = strToInt(token(bb_orig_str, ' ', 1));
-			bb_orig.xr = strToInt(token(bb_orig_str, ' ', 2));
-			bb_orig.yt = strToInt(token(bb_orig_str, ' ', 3));
+		string const tmp = readBB_from_PSFile(filename);
+		if (!tmp.empty()) {
+			int const bb_orig_xl = strToInt(token(tmp, ' ', 0));
+			int const bb_orig_yb = strToInt(token(tmp, ' ', 1));
 
-			bb.xl -= bb_orig.xl;
-			bb.xr -= bb_orig.xl;
-			bb.yb -= bb_orig.yb;
-			bb.yt -= bb_orig.yb;
+			bb.xl -= bb_orig_xl;
+			bb.xr -= bb_orig_xl;
+			bb.yb -= bb_orig_yb;
+			bb.yt -= bb_orig_yb;
 		}
 
+		bb.xl = std::max(0, bb.xl);
+		bb.xr = std::max(0, bb.xr);
+		bb.yb = std::max(0, bb.yb);
+		bb.yt = std::max(0, bb.yt);
+
 		// Paranoia check.
 		int const width  = bb.xr - bb.xl;
 		int const height = bb.yt - bb.yb;