--- a/src/Makefile
+++ b/src/Makefile
@@ -387,6 +387,13 @@
 	@ echo "_____________________________________________________________"
 	@ echo ""
 
+verb.mex:
+	@ echo "_____________________________________________________________"
+	@ echo ""
+	@ echo "        Debian compilation (Octave)"
+	@ echo "_____________________________________________________________"
+	@ echo ""
+
 verb.external:
 	@ echo "_____________________________________________________________"
 	@ echo ""
--- a/src/spm_existfile.c
+++ b/src/spm_existfile.c
@@ -5,11 +5,13 @@
  
 #define _FILE_OFFSET_BITS 64
 
+#include <stdio.h>
 #include "mex.h"
 
+
 void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
 {
-    bool status    = false;
+    bool status    = 0;
     char *filename = NULL;
     FILE *fid      = NULL;
     
@@ -23,7 +25,7 @@
         fid = fopen(filename,"r");
         if (fid != NULL)
         {
-            status = true;
+            status = 1;
             fclose(fid);
         }
         mxFree(filename);
