diff --git a/lcthw-remnants-2/.gitignore b/lcthw-remnants-2/.gitignore
index 6d21d2b..da2db83 100644
--- a/lcthw-remnants-2/.gitignore
+++ b/lcthw-remnants-2/.gitignore
@@ -1,2 +1,3 @@
 ex1
 ex3
+ex4
diff --git a/lcthw-remnants-2/Dockerfile b/lcthw-remnants-2/Dockerfile
index e039450..6a227e0 100644
--- a/lcthw-remnants-2/Dockerfile
+++ b/lcthw-remnants-2/Dockerfile
@@ -3,4 +3,4 @@ FROM ubuntu:xenial
 ENV DEBIAN_FRONTEND noninteractive
 
 RUN apt-get update -yq
-RUN apt-get install -yq build-essential git man
+RUN apt-get install -yq build-essential git man curl
diff --git a/lcthw-remnants-2/ex4.c b/lcthw-remnants-2/ex4.c
new file mode 100644
index 0000000..7e49361
--- /dev/null
+++ b/lcthw-remnants-2/ex4.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+/* Warning: This program is wrong on purpose. */
+
+int main()
+{
+  int age = 10;
+  int height;
+
+  printf("I am %d years old.\n");
+  printf("I am %d inches tall.\n", height);
+
+  return 0;
+}