diff --git a/Cantera/src/funcs.cpp b/Cantera/src/funcs.cpp
index 3a33e94f5..ab2720b3c 100755
--- a/Cantera/src/funcs.cpp
+++ b/Cantera/src/funcs.cpp
@@ -7,6 +7,8 @@
 #endif
 
 #include <vector>
+#include <algorithm>
+
 using namespace std;
 
 #include "ct_defs.h"
diff --git a/Cantera/src/funcs.h b/Cantera/src/funcs.h
new file mode 100644
index 000000000..d7b98e161
--- /dev/null
+++ b/Cantera/src/funcs.h
@@ -0,0 +1,11 @@
+#ifndef CT_FUNCS_H
+#define CT_FUNCS_H
+
+#include "ct_defs.h"
+ 
+namespace Cantera {
+    doublereal linearInterp(doublereal x, const vector_fp& xpts, 
+        const vector_fp& fpts);
+}
+
+#endif