diff --git a/libretro-common/file/file_extract.c b/libretro-common/file/file_extract.c
index ffb3251e24..173af8a2da 100644
--- a/libretro-common/file/file_extract.c
+++ b/libretro-common/file/file_extract.c
@@ -479,8 +479,7 @@ end:
    return ret;
 }
 
-
-int zlib_parse_file_iterate_step_internal(
+static int zlib_parse_file_iterate_step_internal(
       zlib_transfer_t *state, char *filename,
       const uint8_t **cdata,
       unsigned *cmode, uint32_t *size, uint32_t *csize,
@@ -519,7 +518,7 @@ int zlib_parse_file_iterate_step_internal(
    return 1;
 }
 
-int zlib_parse_file_iterate_step(zlib_transfer_t *state,
+static int zlib_parse_file_iterate_step(zlib_transfer_t *state,
       const char *valid_exts, void *userdata, zlib_file_cb file_cb)
 {
    const uint8_t *cdata = NULL;
@@ -549,7 +548,7 @@ int zlib_parse_file_iterate_step(zlib_transfer_t *state,
    return 1;
 }
 
-int zlib_parse_file_init(zlib_transfer_t *state,
+static int zlib_parse_file_init(zlib_transfer_t *state,
       const char *file)
 {
    state->backend = zlib_get_default_file_backend();