diff --git a/libfatstr/Makefile b/libfatstr/Makefile
index d432184..fc93cd7 100644
--- a/libfatstr/Makefile
+++ b/libfatstr/Makefile
@@ -1,2 +1 @@
-libfatstr.o: libfatstr.c libfatstr.h
-	$(CC) -c -g -o libfatstr.o libfatstr.c
+libfatstr.o:
diff --git a/libfatstr/libfatstr.h b/libfatstr/libfatstr.h
index 0eb6176..f6d0c00 100644
--- a/libfatstr/libfatstr.h
+++ b/libfatstr/libfatstr.h
@@ -18,6 +18,8 @@ struct FatStr{
  * Otherwise returns p. */
 struct FatStr *FatStr_append(struct FatStr *p, FatStr_scalar_t c);
 
+struct FatStr *FatStr_construct(struct FatStr *p);
+
 /* FatStr_convert
  * - FatStr *p: object to convert
  * Returns NULL if the operation failed (due to malloc(3)) or if p was NULL.
@@ -30,5 +32,6 @@ char *FatStr_convert(struct FatStr *p);
  * Returns NULL. */
 struct FatStr *FatStr_destruct(struct FatStr *p);
 
+struct FatStr *FatStr_grow(struct FatStr *p, size_t units);
 struct FatStr *FatStr_initialize(struct FatStr *p);
 struct FatStr *FatStr_trimfront(struct FatStr *p, size_t units);