diff --git a/libdssp/include/dssp.hpp b/libdssp/include/dssp.hpp
index 06784be..6829035 100644
--- a/libdssp/include/dssp.hpp
+++ b/libdssp/include/dssp.hpp
@@ -29,7 +29,7 @@
 /// \file DSSP.hpp
 /// Calculate DSSP-like secondary structure information.
 
-#include <cif++.hpp>
+#include <cif++/cif++.hpp>
 
 #include <filesystem>
 #include <iterator>
diff --git a/libdssp/src/dssp-io.cpp b/libdssp/src/dssp-io.cpp
index c937cb9..c7703da 100644
--- a/libdssp/src/dssp-io.cpp
+++ b/libdssp/src/dssp-io.cpp
@@ -31,7 +31,7 @@
 #include "revision.hpp"
 
 #include <algorithm>
-#include <cif++.hpp>
+#include <cif++/cif++.hpp>
 #include <cif++/dictionary_parser.hpp>
 #include <cif++/row.hpp>
 #include <format>
diff --git a/src/mkdssp.cpp b/src/mkdssp.cpp
index dead003..42dd98a 100644
--- a/src/mkdssp.cpp
+++ b/src/mkdssp.cpp
@@ -33,7 +33,7 @@
 #include <fstream>
 #include <iostream>
 
-#include <cif++.hpp>
+#include <cif++/cif++.hpp>
 #include <mcfp/mcfp.hpp>
 
 #include "dssp.hpp"