diff --git a/iguana/exchanges/LP_include.h b/iguana/exchanges/LP_include.h
index 509255c58..d90c0c3ef 100644
--- a/iguana/exchanges/LP_include.h
+++ b/iguana/exchanges/LP_include.h
@@ -29,9 +29,10 @@
 
 #ifdef FROMGUI
 #define printf dontprintf
-#define fprintf dontprintf
+#define fprintf fdontprintf
 
 void dontprintf(char *formatstr,...) {}
+void fdontprintf(FILE *fp,char *formatstr,...) {}
 #endif
 
 #define LP_MAJOR_VERSION "0"