diff --git a/src/muntar.c b/src/muntar.c
index 09f89bf..8b09b7f 100644
--- a/src/muntar.c
+++ b/src/muntar.c
@@ -219,7 +219,7 @@ int untar_to_path(const char *path, const uint8_t *buf,
 			const size_t namelen = strlen(header->name);
 			if(p-tpath+namelen>1023) return(MTAR_EOPENFAIL);
 			strcpy(p,header->name);
-			FILE *fp = fopen(tpath,"w");
+			FILE *fp = fopen(tpath,"wb");
 			if(!fp) {
 				fprintf(stderr,
 					"Error open file for write: %s\n",