diff --git a/ortools/glop/lp_solver.cc b/ortools/glop/lp_solver.cc
index dace9c51c2..c678b87b04 100644
--- a/ortools/glop/lp_solver.cc
+++ b/ortools/glop/lp_solver.cc
@@ -20,7 +20,6 @@
 #include "absl/memory/memory.h"
 #include "absl/strings/match.h"
 #include "absl/strings/str_format.h"
-#include "absl/strings/str_join.h"
 #include "ortools/base/commandlineflags.h"
 #include "ortools/base/integral_types.h"
 #include "ortools/base/timer.h"
diff --git a/ortools/lp_data/sparse.cc b/ortools/lp_data/sparse.cc
index 63293d7ca9..4d07cc503d 100644
--- a/ortools/lp_data/sparse.cc
+++ b/ortools/lp_data/sparse.cc
@@ -16,7 +16,6 @@
 #include <algorithm>
 
 #include "absl/strings/str_format.h"
-#include "absl/strings/str_join.h"
 #include "ortools/base/logging.h"
 #include "ortools/lp_data/lp_types.h"
 #include "ortools/lp_data/permutation.h"