diff --git a/c-programming/io/freadln.c b/c-programming/io/freadln.c
index 383a4d3..8a74635 100644
--- a/c-programming/io/freadln.c
+++ b/c-programming/io/freadln.c
@@ -42,7 +42,7 @@ int freadln(FILE* f, char** output, size_t* length_out) {
 	}
 
 	int character;
-	while ((character = fgetc(f)) != EOF
+	while ((character = fgetc(f)) != EOF && character != EOT
 	       /* stop on a newline character: */ && character != '\n') {
 		(*output)[length] = (char) character;
 
diff --git a/c-programming/io/freadln.h b/c-programming/io/freadln.h
index c98809e..4db8c98 100644
--- a/c-programming/io/freadln.h
+++ b/c-programming/io/freadln.h
@@ -12,6 +12,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#define EOT 4 /* end of transmission */
+
 typedef size_t freadln_length_type;
 
 enum freadln_status {