diff --git a/slow.c b/slow.c
index c61c0a3..541039e 100644
--- a/slow.c
+++ b/slow.c
@@ -31,11 +31,18 @@ int main(int argc, char *argv[]) {
 
 	while((nread = fread(&buffer, 1, sizeof buffer, stdin)) > 0) {
 		usleep(useconds);
-		fwrite(&buffer, 1, nread, stdout);
+		if(fwrite(&buffer, 1, nread, stdout) != nread) {
+			fprintf(stderr, "stdout: write error");
+			exit(EXIT_FAILURE);
+		}
 		if(flush) {
 			fflush(stdout);
 		}
 	}
+	if(ferror(stdin)) {
+		fprintf(stderr, "stdin: read error");
+		exit(EXIT_FAILURE);
+	}
 
 	return EXIT_SUCCESS;
 }
diff --git a/todo.txt b/todo.txt
index 07d55a3..93851e3 100644
--- a/todo.txt
+++ b/todo.txt
@@ -1,4 +1,4 @@
 - [x] Add forced flush option. -f ? -F ?
 - [ ] Write man page
-- [ ] Send errors to sderr
+- [x] Send errors to sderr
 - [ ] Release v1