diff --git a/internal/ceres/line_search_direction.h b/internal/ceres/line_search_direction.h
index 71063ab..0874754 100644
--- a/internal/ceres/line_search_direction.h
+++ b/internal/ceres/line_search_direction.h
@@ -31,6 +31,8 @@
 #ifndef CERES_INTERNAL_LINE_SEARCH_DIRECTION_H_
 #define CERES_INTERNAL_LINE_SEARCH_DIRECTION_H_
 
+#ifndef CERES_NO_LINE_SEARCH_MINIMIZER
+
 #include "ceres/internal/eigen.h"
 #include "ceres/line_search_minimizer.h"
 #include "ceres/types.h"
@@ -67,4 +69,5 @@
 }  // namespace internal
 }  // namespace ceres
 
+#endif  // CERES_NO_LINE_SEARCH_MINIMIZER
 #endif  // CERES_INTERNAL_LINE_SEARCH_DIRECTION_H_