diff --git a/src/util/system.h b/src/util/system.h
index 78ebf751bf..2be8bb754b 100644
--- a/src/util/system.h
+++ b/src/util/system.h
@@ -60,7 +60,7 @@ bool FileCommit(FILE *file);
 bool TruncateFile(FILE *file, unsigned int length);
 int RaiseFileDescriptorLimit(int nMinFD);
 void AllocateFileRange(FILE *file, unsigned int offset, unsigned int length);
-bool RenameOver(fs::path src, fs::path dest);
+[[nodiscard]] bool RenameOver(fs::path src, fs::path dest);
 bool LockDirectory(const fs::path& directory, const std::string lockfile_name, bool probe_only=false);
 void UnlockDirectory(const fs::path& directory, const std::string& lockfile_name);
 bool DirIsWritable(const fs::path& directory);
diff --git a/src/validation.cpp b/src/validation.cpp
index 71402ef263..9197daec80 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -5110,7 +5110,9 @@ bool DumpMempool(const CTxMemPool& pool)
         if (!FileCommit(file.Get()))
             throw std::runtime_error("FileCommit failed");
         file.fclose();
-        RenameOver(GetDataDir() / "mempool.dat.new", GetDataDir() / "mempool.dat");
+        if (!RenameOver(GetDataDir() / "mempool.dat.new", GetDataDir() / "mempool.dat")) {
+            throw std::runtime_error("Rename failed");
+        }
         int64_t last = GetTimeMicros();
         LogPrintf("Dumped mempool: %gs to copy, %gs to dump\n", (mid-start)*MICRO, (last-mid)*MICRO);
     } catch (const std::exception& e) {