diff --git a/src/CvSourceImpl.h b/src/CvSourceImpl.h
index 91d29db5db..2614cd318e 100644
--- a/src/CvSourceImpl.h
+++ b/src/CvSourceImpl.h
@@ -12,8 +12,6 @@
 #include <functional>
 #include <vector>
 
-#include "llvm/StringMap.h"
-
 #include "SourceImpl.h"
 
 namespace cs {