diff --git a/src/client/libdistren_unbias.c b/src/client/libdistren_unbias.c
--- a/src/client/libdistren_unbias.c
+++ b/src/client/libdistren_unbias.c
@@ -21,6 +21,8 @@
   Implementation of libdistren functions that exist to prevent this library from being biased toward certain methods of reporting errors/debug info or free()ing and malloc()ing
  */
 
+#include "common/config.h"
+
 #include "libdistren.h"
 
 void *_malloc(distren_t distren, size_t size)