diff --git a/programs/fileio.c b/programs/fileio.c
index 01126c113..7a6af7929 100644
--- a/programs/fileio.c
+++ b/programs/fileio.c
@@ -3716,13 +3716,6 @@ static void FIO_freeDResources(dRess_t ress)
     FIO_rust_freeDResources(&state);
 }
 
-/* FIO_passThrough() : just copy input into output, for compatibility with gzip -df mode
- * @return : 0 (no error) */
-static int FIO_passThrough(dRess_t *ress)
-{
-    return FIO_rust_passThrough(ress->readCtx, ress->writeCtx);
-}
-
 enum {
     FIO_RUST_ZSTD_ERROR_HELP_WINDOW_SIZE = 0,
     FIO_RUST_ZSTD_ERROR_HELP_WINDOW_GUIDANCE = 1,
@@ -4248,11 +4241,14 @@ static int FIO_rust_decompressZstdFrameCallback(void* opaque,
     return *frameSize == FIO_ERROR_FRAME_DECODING;
 }
 
+/* FIO_passThrough() : just copy input into output, for compatibility with gzip -df mode
+ * @return : 0 (no error) */
 static int FIO_rust_decompressPassThroughCallback(void* opaque)
 {
     FIO_rust_decompression_projection_t* const projection =
         (FIO_rust_decompression_projection_t*)opaque;
-    return FIO_passThrough(projection->ress);
+    return FIO_rust_passThrough(projection->ress->readCtx,
+                                projection->ress->writeCtx);
 }
 
 static void FIO_rust_decompressStatusCallback(void* opaque,
@@ -4875,13 +4871,6 @@ FIO_rust_analyzeFrames_display(int diagnostic,
     DISPLAYLEVEL(1, " \n");
 }
 
-static InfoError
-FIO_analyzeFrames(fileInfo_t* info, FILE* const srcFile)
-{
-    return (InfoError)FIO_rust_analyzeFrames(info, srcFile);
-}
-
-
 static InfoError
 getFileInfo_fileConfirmed(fileInfo_t* info, const char* inFileName)
 {
@@ -4891,7 +4880,7 @@ getFileInfo_fileConfirmed(fileInfo_t* info, const char* inFileName)
     ERROR_IF(srcFile == NULL, info_file_error, "Error: could not open source file %s", inFileName);
 
     info->compressedSize = UTIL_getFileSizeStat(&srcFileStat);
-    status = FIO_analyzeFrames(info, srcFile);
+    status = (InfoError)FIO_rust_analyzeFrames(info, srcFile);
 
     fclose(srcFile);
     info->nbFiles = 1;