diff --git a/src/compiler/spirv/spirv_to_nir.c b/src/compiler/spirv/spirv_to_nir.c
index 2b3ed49c035..522532f06ee 100644
--- a/src/compiler/spirv/spirv_to_nir.c
+++ b/src/compiler/spirv/spirv_to_nir.c
@@ -156,7 +156,7 @@ vtn_dump_shader(struct vtn_builder *b, const char *path, const char *prefix)
    if (len < 0 || len >= sizeof(filename))
       return;
 
-   FILE *f = fopen(filename, "w");
+   FILE *f = fopen(filename, "wb");
    if (f == NULL)
       return;