Index: mttroot/mtt/lib/rep/sfun_rep/mex_ae.c.tmpl
==================================================================
--- mttroot/mtt/lib/rep/sfun_rep/mex_ae.c.tmpl
+++ mttroot/mtt/lib/rep/sfun_rep/mex_ae.c.tmpl
@@ -1,10 +1,11 @@
 /* -*-c-*-	Put emacs into c-mode
  * <mtt_model_name>_sfun_ae.c:
  * Matlab mex algebraic equations for <mtt_model_name>
  */
 
+#include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <mex.h>
 #include "sfun_debug.h"
 #include "<mtt_model_name>_def.h"

Index: mttroot/mtt/lib/rep/sfun_rep/sfun.c.tmpl
==================================================================
--- mttroot/mtt/lib/rep/sfun_rep/sfun.c.tmpl
+++ mttroot/mtt/lib/rep/sfun_rep/sfun.c.tmpl
@@ -4,10 +4,11 @@
  */
 
 #define S_FUNCTION_NAME <mtt_model_name>_sfun
 #define S_FUNCTION_LEVEL 2
 
+#include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include "simstruc.h"
 #include "sfun_debug.h"
 #include "<mtt_model_name>_def.h"

Index: mttroot/mtt/lib/rep/sfun_rep/sfun_input.c.tmpl
==================================================================
--- mttroot/mtt/lib/rep/sfun_rep/sfun_input.c.tmpl
+++ mttroot/mtt/lib/rep/sfun_rep/sfun_input.c.tmpl
@@ -4,10 +4,11 @@
  */
 
 #define S_FUNCTION_NAME <mtt_model_name>_sfun_input
 #define S_FUNCTION_LEVEL 2
 
+#include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include "simstruc.h"
 #include "sfun_debug.h"
 #include "<mtt_model_name>_def.h"

Index: mttroot/mtt/lib/rep/sfun_rep/sfun_interface.c.tmpl
==================================================================
--- mttroot/mtt/lib/rep/sfun_rep/sfun_interface.c.tmpl
+++ mttroot/mtt/lib/rep/sfun_rep/sfun_interface.c.tmpl
@@ -5,10 +5,11 @@
 
 
 #define S_FUNCTION_NAME <mtt_model_name>_sfun_interface
 #define S_FUNCTION_LEVEL 2
 
+#include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include "simstruc.h"
 #include "sfun_debug.h"
 #include "<mtt_model_name>_def.h"