diff --git a/src/riemanniantrsolver.hh b/src/riemanniantrsolver.hh
index cb6065ac74f3db2e35c58ceb6a86cc6ea198b14e..94618520d9804adfb0e012bd4d78b674fec76e8e 100644
--- a/src/riemanniantrsolver.hh
+++ b/src/riemanniantrsolver.hh
@@ -1,5 +1,5 @@
-#ifndef ROD_SOLVER_HH
-#define ROD_SOLVER_HH
+#ifndef RIEMANNIAN_TRUST_REGION_SOLVER_HH
+#define RIEMANNIAN_TRUST_REGION_SOLVER_HH
 
 #include <vector>