diff --git a/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp b/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp
index ee9a916..dee3a7c 100644
--- a/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp
+++ b/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp
@@ -24,7 +24,6 @@
 #include "fpdfsdk/formfiller/cffl_textfield.h"
 #include "public/fpdf_fwlevent.h"
 #include "third_party/base/check.h"
-#include "third_party/base/check_op.h"
 #include "third_party/base/cxx17_backports.h"
 
 CFFL_InteractiveFormFiller::CFFL_InteractiveFormFiller(
diff --git a/testing/string_write_stream.cpp b/testing/string_write_stream.cpp
index f35930b..a4a0947 100644
--- a/testing/string_write_stream.cpp
+++ b/testing/string_write_stream.cpp
@@ -6,7 +6,6 @@
 
 #include "core/fxcrt/bytestring.h"
 #include "core/fxcrt/widestring.h"
-#include "third_party/base/check_op.h"
 
 StringWriteStream::StringWriteStream() = default;