diff --git a/xs/xsp/Clipper.xsp b/xs/xsp/Clipper.xsp
index c4640dcf4..40ee6480b 100644
--- a/xs/xsp/Clipper.xsp
+++ b/xs/xsp/Clipper.xsp
@@ -71,7 +71,7 @@ diff(subject, clip, safety_offset = false)
     Polygons    clip
     bool        safety_offset
     CODE:
-        RETVAL = diff(subject, clip, safety_offset);
+        RETVAL = diff(subject, clip, safety_offset ? ApplySafetyOffset::Yes : ApplySafetyOffset::No);
     OUTPUT:
         RETVAL
 
@@ -81,7 +81,7 @@ diff_ex(subject, clip, safety_offset = false)
     Polygons    clip
     bool        safety_offset
     CODE:
-        RETVAL = diff_ex(subject, clip, safety_offset);
+        RETVAL = diff_ex(subject, clip, safety_offset ? ApplySafetyOffset::Yes : ApplySafetyOffset::No);
     OUTPUT:
         RETVAL
 
@@ -100,7 +100,7 @@ intersection(subject, clip, safety_offset = false)
     Polygons                    clip
     bool                        safety_offset
     CODE:
-        RETVAL = intersection(subject, clip, safety_offset);
+        RETVAL = intersection(subject, clip, safety_offset ? ApplySafetyOffset::Yes : ApplySafetyOffset::No);
     OUTPUT:
         RETVAL
 
@@ -110,7 +110,7 @@ intersection_ex(subject, clip, safety_offset = false)
     Polygons                    clip
     bool                        safety_offset
     CODE:
-        RETVAL = intersection_ex(subject, clip, safety_offset);
+        RETVAL = intersection_ex(subject, clip, safety_offset ? ApplySafetyOffset::Yes : ApplySafetyOffset::No);
     OUTPUT:
         RETVAL
 
@@ -128,7 +128,7 @@ union(subject, safety_offset = false)
     Polygons    subject
     bool        safety_offset
     CODE:
-        RETVAL = union_(subject, safety_offset);
+        RETVAL = safety_offset ? union_safety_offset(subject) : union_(subject);
     OUTPUT:
         RETVAL
 
@@ -137,7 +137,7 @@ union_ex(subject, safety_offset = false)
     Polygons                    subject
     bool                        safety_offset
     CODE:
-        RETVAL = union_ex(subject, safety_offset);
+        RETVAL = safety_offset ? union_safety_offset_ex(subject) : union_ex(subject);
     OUTPUT:
         RETVAL