diff --git a/lib/pc_patch.c b/lib/pc_patch.c
index 4a36157..858eef3 100644
--- a/lib/pc_patch.c
+++ b/lib/pc_patch.c
@@ -13,7 +13,6 @@
 #include <math.h>
 #include <assert.h>
 #include "pc_api_internal.h"
-#include "stringbuffer.h"
 
 int
 pc_patch_compute_extent(PCPATCH *pa)