diff --git a/common/dummy_malloc.c b/common/dummy_malloc.c
index ab67120..0120d9b 100644
--- a/common/dummy_malloc.c
+++ b/common/dummy_malloc.c
@@ -32,6 +32,11 @@
 {
 	void *mem = sbrk(bytes + alignment);
 
+	if (!mem) {
+		errno = ENOMEM;
+		return NULL;
+	}
+
 	return PTR_ALIGN(mem, alignment);
 }