diff --git a/core/fxcodec/fax/faxmodule.cpp b/core/fxcodec/fax/faxmodule.cpp
index d8df9e1..da39918 100644
--- a/core/fxcodec/fax/faxmodule.cpp
+++ b/core/fxcodec/fax/faxmodule.cpp
@@ -87,7 +87,7 @@
   return max_pos;
 }
 
-void FaxG4FindB1B2(const std::vector<uint8_t>& ref_buf,
+void FaxG4FindB1B2(pdfium::span<const uint8_t> ref_buf,
                    int columns,
                    int a0,
                    bool a0color,
@@ -284,7 +284,7 @@
                  int bitsize,
                  int* bitpos,
                  uint8_t* dest_buf,
-                 const std::vector<uint8_t>& ref_buf,
+                 pdfium::span<const uint8_t> ref_buf,
                  int columns) {
   int a0 = -1;
   bool a0color = true;
diff --git a/core/fxcodec/jpx/cjpx_decoder.cpp b/core/fxcodec/jpx/cjpx_decoder.cpp
index f865d38..4653b5e 100644
--- a/core/fxcodec/jpx/cjpx_decoder.cpp
+++ b/core/fxcodec/jpx/cjpx_decoder.cpp
@@ -9,6 +9,7 @@
 #include <algorithm>
 #include <limits>
 #include <utility>
+#include <vector>
 
 #include "core/fxcodec/jpx/jpx_decode_utils.h"
 #include "core/fxcrt/fx_safe_types.h"
@@ -498,7 +499,7 @@
 
 bool CJPX_Decoder::Decode(uint8_t* dest_buf,
                           uint32_t pitch,
-                          const std::vector<uint8_t>& offsets) {
+                          pdfium::span<const uint8_t> offsets) {
   if (m_Image->comps[0].w != m_Image->x1 || m_Image->comps[0].h != m_Image->y1)
     return false;
 
diff --git a/core/fxcodec/jpx/cjpx_decoder.h b/core/fxcodec/jpx/cjpx_decoder.h
index 11d94c1..1fe5043 100644
--- a/core/fxcodec/jpx/cjpx_decoder.h
+++ b/core/fxcodec/jpx/cjpx_decoder.h
@@ -8,7 +8,6 @@
 #define CORE_FXCODEC_JPX_CJPX_DECODER_H_
 
 #include <memory>
-#include <vector>
 
 #include "core/fxcrt/unowned_ptr.h"
 #include "third_party/base/span.h"
@@ -41,7 +40,7 @@
   bool StartDecode();
   bool Decode(uint8_t* dest_buf,
               uint32_t pitch,
-              const std::vector<uint8_t>& offsets);
+              pdfium::span<const uint8_t> offsets);
 
  private:
   const ColorSpaceOption m_ColorSpaceOption;