diff --git a/Tinn.c b/Tinn.c
index 8c9c069..b300c91 100644
--- a/Tinn.c
+++ b/Tinn.c
@@ -125,14 +125,14 @@ static void twrand(Tinn t)
 #endif
 }
 
-double ttrain(Tinn t, double* in, double* tg, double rate)
+double xttrain(Tinn t, double* in, double* tg, double rate)
 {
     forewards(t, in);
     backwards(t, in, tg, rate);
     return error(t, tg);
 }
 
-Tinn tbuild(int nips, int nops, int nhid)
+Tinn xtbuild(int nips, int nops, int nhid)
 {
     Tinn t;
     t.o = (double*) calloc(nops, sizeof(*t.o));
@@ -145,7 +145,7 @@ Tinn tbuild(int nips, int nops, int nhid)
     return t;
 }
 
-void tfree(Tinn t)
+void xtfree(Tinn t)
 {
     free(t.w);
     free(t.h);
diff --git a/Tinn.h b/Tinn.h
index bb812fe..76e92cb 100644
--- a/Tinn.h
+++ b/Tinn.h
@@ -3,24 +3,19 @@
 
 typedef struct
 {
-    double* o; /*       Output layer       */
-    double* h; /*       Hidden layer       */
-    double* w; /*     Training weights     */
-    int nops;  /* Number of Output Neurons */
-    int nhid;  /* Number of Hidden Neurons */
-    int nips;  /* Number of Input  Neurons */
+    double* o;
+    double* h;
+    double* w;
+    int nops;
+    int nhid;
+    int nips;
 }
 Tinn;
 
-/* Trains a Tinn object given input (in) data, target (tg) data,
- * and a learning rate (recommended 0.0 - 1.0) */
-double ttrain(Tinn, double* in, double* tg, double rate);
+double xttrain(Tinn, double* in, double* tg, double rate);
 
-/* Returns a Tinn object given number of inputs (nips),
- * number of outputs (nops), and number of hidden layers (nhid) */
-Tinn tbuild(int nips, int nops, int nhid);
+Tinn xtbuild(int nips, int nops, int nhid);
 
-/* Frees a tinn object from heap memory */
-void tfree(Tinn);
+void xtfree(Tinn);
 
 #endif
diff --git a/test.c b/test.c
index ffca78b..0c8fa10 100644
--- a/test.c
+++ b/test.c
@@ -26,11 +26,11 @@ int main()
     int nops = 1;
     double* in = inload(nips);
     double* tg = tgload(nops);
-    Tinn tinn = tbuild(nips, nops, nhid);
+    Tinn tinn = xtbuild(nips, nops, nhid);
     int i;
     for(i = 0; i <= 10000; i++)
-        printf("%.18f\n", ttrain(tinn, in, tg, 0.5));
-    tfree(tinn);
+        printf("%.18f\n", xttrain(tinn, in, tg, 0.5));
+    xtfree(tinn);
     free(in);
     free(tg);
     return 0;