diff --git a/src/datadog/trace_sampler.h b/src/datadog/trace_sampler.h
index b75b35ae..162e25c9 100644
--- a/src/datadog/trace_sampler.h
+++ b/src/datadog/trace_sampler.h
@@ -75,7 +75,7 @@
 // matching rule is used.
 //
 // The global rate (section 2, above) is implemented as a sampling rule that
-// matches any span and is appended to any configured sampling rules.  This,
+// matches any span and is appended to any configured sampling rules.  Thus,
 // sampling rules override the global sample rate for matching root spans.
 //
 // The volume of traces kept by sampling rules (including the global sample