diff --git a/font-patcher b/font-patcher
index 585eae11f..a5301088e 100755
--- a/font-patcher
+++ b/font-patcher
@@ -703,12 +703,20 @@ def copy_glyphs(sourceFont, sourceFontStart, sourceFontEnd, symbolFont, symbolFo
         align_matrix = psMat.translate(x_align_distance, y_align_distance)
         sourceFont.transform(align_matrix)
 
-        if args.single:
-            # Ensure the font is considered monospaced on Windows by setting the same
-            # width for all character glyphs.
-            # This needs to be done for all glyphs, even the ones that are empty and
-            # didn't go through the scaling operations.
-            sourceFont[currentSourceFontGlyph].width = font_dim['width']
+        # Needed for setting 'advance width' on each glyph so they do not overlap,
+        # also ensures the font is considered monospaced on Windows by setting the
+        # same width for all character glyphs.
+        # This needs to be done for all glyphs, even the ones that are empty and
+        # didn't go through the scaling operations.
+        sourceFont[currentSourceFontGlyph].width = font_dim['width']
+
+        # Ensure after horizontal adjustments and centering that the glyph
+        # does not overlap the bearings (edges)
+        if sourceFont[currentSourceFontGlyph].left_side_bearing < 0:
+          sourceFont[currentSourceFontGlyph].left_side_bearing = 0.0
+
+        if sourceFont[currentSourceFontGlyph].right_side_bearing < 0:
+          sourceFont[currentSourceFontGlyph].right_side_bearing = 0.0
 
         # reset selection so iteration works properly @todo fix? rookie misunderstanding?
         # This is likely needed because the selection was changed when the glyph was copy/pasted