diff --git a/impl/src/utils.c b/impl/src/utils.c
index e5de856..9047d20 100644
--- a/impl/src/utils.c
+++ b/impl/src/utils.c
@@ -7,7 +7,7 @@
 
 bool dump_array_cf(const float complex *data, size_t n, float T, const char *filename)
 {
-	FILE *f = fopen(filename, "w");
+	FILE *f = fopen(filename, "wb");
 	if(!f) {
 		return false;
 	}