diff --git a/CMakeLists.txt b/CMakeLists.txt
index 180c387..65cf203 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,7 @@ endforeach()
 
 aux_source_directory(. DIR_SRCS)
 add_library(Stage-Discharge-Relation ${CMAKE_LIB_TYPE} ${DIR_SRCS})
+target_link_libraries(Stage-Discharge-Relation "log")
 
 add_subdirectory("test-hdsmf")
 
diff --git a/calc_gate.h b/calc_gate.h
index 1b91a08..7414f19 100644
--- a/calc_gate.h
+++ b/calc_gate.h
@@ -1,6 +1,8 @@
 #ifndef _CALC_GATE_H
 #define _CALC_GATE_H
 
+#include "wisfarm-config.h"
+
 #define   g		9.81
 
 struct param_gate{