diff --git a/subject/main.c b/subject/main.c
index d7e4a62..c3bdc3f 100644
--- a/subject/main.c
+++ b/subject/main.c
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <stddef.h>
+#include <stdlib.h>
 
 #define container_of(ptr, type, member) ({ \
 	const typeof(((type*)0)->member)* __mptr = (ptr); \
@@ -29,5 +30,10 @@ int main(int argc, char** argv) {
 	struct B b = { 1, 2, 3, NULL, 4.f, a, NULL };
 
 	b.m2 = 42;
+
+	struct B* someB = (struct B*)malloc(sizeof(struct B));
+	float* someB_m4 = &someB->m4; // This is not recognized yet, simply ends up as "add 0x10"
+	container_of(someB_m4, struct B, m4)->m1 = 'x';
+
 	return 0;
 }