diff --git a/src/ld/elfobj.c b/src/ld/elfobj.c
index abd3b1a98..e5ea8d61d 100644
--- a/src/ld/elfobj.c
+++ b/src/ld/elfobj.c
@@ -143,7 +143,7 @@ void elfobj_init(ElfObj *elfobj) {
 
 bool open_elf(const char *fn, ElfObj *elfobj) {
   FILE *fp;
-  if (!is_file(fn) || (fp = fopen(fn, "r")) == NULL) {
+  if (!is_file(fn) || (fp = fopen(fn, "rb")) == NULL) {
     fprintf(stderr, "cannot open: %s\n", fn);
   } else {
     if (read_elf(elfobj, fp, fn))
diff --git a/src/util/archive.c b/src/util/archive.c
index e62b8a78f..eacf72290 100644
--- a/src/util/archive.c
+++ b/src/util/archive.c
@@ -18,7 +18,7 @@ static uint32_t read4be(FILE *fp) {
 
 Archive *load_archive(const char *filename) {
   FILE *fp;
-  if (!is_file(filename) || (fp = fopen(filename, "r")) == NULL)
+  if (!is_file(filename) || (fp = fopen(filename, "rb")) == NULL)
     return NULL;
 
   Archive *ar = malloc_or_die(sizeof(*ar));
diff --git a/src/wcc/wasm_linker.c b/src/wcc/wasm_linker.c
index 9eb8f4a41..58fc47445 100644
--- a/src/wcc/wasm_linker.c
+++ b/src/wcc/wasm_linker.c
@@ -1423,7 +1423,7 @@ bool read_wasm_obj(WasmLinker *linker, const char *filename) {
   char *ext = get_ext(filename);
   if (strcasecmp(ext, "o") == 0) {
     FILE *fp;
-    if (!is_file(filename) || (fp = fopen(filename, "r")) == NULL) {
+    if (!is_file(filename) || (fp = fopen(filename, "rb")) == NULL) {
       fprintf(stderr, "cannot open: %s\n", filename);
       return false;
     }