diff --git a/src/fix_indent.cpp b/src/fix_indent.cpp
index c63462ba12..55f5f9cf86 100644
--- a/src/fix_indent.cpp
+++ b/src/fix_indent.cpp
@@ -261,7 +261,7 @@ void FixIndent::post_force(int vflag)
     domain->remap(ctr);
 
     double radius;
-    if (rstr) radius = input->variable->compute_equal(zvar);
+    if (rstr) radius = input->variable->compute_equal(rvar);
     else radius = rvalue;
 
     double **x = atom->x;