diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
index edec883264a..8237d7d34f0 100644
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -12,6 +12,7 @@
 #include <consensus/consensus.h>
 #include <core_io.h>
 #include <key_io.h>
+#include <fs.h>
 #include <policy/policy.h>
 #include <policy/rbf.h>
 #include <primitives/transaction.h>
@@ -158,7 +159,7 @@ static void RegisterLoad(const std::string& strInput)
     std::string key = strInput.substr(0, pos);
     std::string filename = strInput.substr(pos + 1, std::string::npos);
 
-    FILE *f = fopen(filename.c_str(), "r");
+    FILE *f = fsbridge::fopen(filename.c_str(), "r");
     if (!f) {
         std::string strErr = "Cannot open file " + filename;
         throw std::runtime_error(strErr);
diff --git a/src/test/script_tests.cpp b/src/test/script_tests.cpp
index eacd7ae894f..0da296495f3 100644
--- a/src/test/script_tests.cpp
+++ b/src/test/script_tests.cpp
@@ -923,7 +923,7 @@ BOOST_AUTO_TEST_CASE(script_build)
     }
 
 #ifdef UPDATE_JSON_TESTS
-    FILE* file = fopen("script_tests.json.gen", "w");
+    FILE* file = fsbridge::fopen("script_tests.json.gen", "w");
     fputs(strGen.c_str(), file);
     fclose(file);
 #endif