diff --git a/gen/abi.h b/gen/abi.h
index 21b2ae23..ea9798ac 100644
--- a/gen/abi.h
+++ b/gen/abi.h
@@ -18,7 +18,11 @@
 #define LDC_GEN_ABI_H
 
 #include "mars.h"
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/CallingConv.h"
+#else
 #include "llvm/CallingConv.h"
+#endif
 #include <vector>
 
 struct Type;