diff --git a/osaca/semantics/marker_utils.py b/osaca/semantics/marker_utils.py
index 42cb923..f47c147 100755
--- a/osaca/semantics/marker_utils.py
+++ b/osaca/semantics/marker_utils.py
@@ -23,6 +23,8 @@ def reduce_to_section(kernel, isa):
         raise ValueError('ISA not supported.')
     if start == -1:
         start = 0
+    if end == -1:
+        end = len(kernel)
     return kernel[start:end]