diff --git a/liba/include/stdlib.h b/liba/include/stdlib.h
index 0b487b74b..6cf0a9654 100644
--- a/liba/include/stdlib.h
+++ b/liba/include/stdlib.h
@@ -9,6 +9,7 @@ LIBA_BEGIN_DECLS
 void free(void *ptr);
 void * malloc(size_t size);
 void * realloc(void *ptr, size_t size);
+void * calloc(size_t count, size_t size);
 
 void abort(void) __attribute__((noreturn));
 
diff --git a/liba/src/calloc.c b/liba/src/calloc.c
new file mode 100644
index 000000000..0b638f4bc
--- /dev/null
+++ b/liba/src/calloc.c
@@ -0,0 +1,9 @@
+#include <stdlib.h>
+
+void * calloc(size_t count, size_t size) {
+  void * result = malloc(count * size);
+  if (result != NULL) {
+    bzero(result, count * size);
+  }
+  return result;
+}