diff --git a/interp/interpreter.go b/interp/interpreter.go
index c6ce6b7f..db121cc7 100644
--- a/interp/interpreter.go
+++ b/interp/interpreter.go
@@ -590,18 +590,14 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 			// GetElementPtr does pointer arithmetic, changing the offset of the
 			// pointer into the underlying object.
 			var offset uint64
-			var gepOperands []uint64
 			for i := 2; i < len(operands); i += 2 {
 				index := operands[i].Uint()
 				elementSize := operands[i+1].Uint()
 				if int64(elementSize) < 0 {
 					// This is a struct field.
-					// The field number is encoded by flipping all the bits.
-					gepOperands = append(gepOperands, ^elementSize)
 					offset += index
 				} else {
 					// This is a normal GEP, probably an array index.
-					gepOperands = append(gepOperands, index)
 					offset += elementSize * index
 				}
 			}