diff --git a/plug-ins/common/qbist.c b/plug-ins/common/qbist.c
index 5b4a6ed..c56a4b1 100644
--- a/plug-ins/common/qbist.c
+++ b/plug-ins/common/qbist.c
@@ -38,6 +38,9 @@
 
 #include "libgimp/stdplugins-intl.h"
 
+#ifndef PATH_MAX
+#define PATH_MAX 4096
+#endif
 
 /** qbist renderer ***********************************************************/