diff --git a/.travis.yml b/.travis.yml
index ffec9e6..d275c1a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,2 +1,7 @@
 language: c
+
+compiler:
+  - clang
+  - gcc
+
 script: make
diff --git a/Makefile b/Makefile
index 6a38ad6..4c0cc48 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,4 @@
-CC = gcc
-CCFLAGS = -ansi -Wall -Wshadow -O2 -g
+CCFLAGS = -Wall -Wshadow -O2 -g
 LFLAGS = -lm
 
 
diff --git a/example3.c b/example3.c
index b6fb026..2ace13b 100644
--- a/example3.c
+++ b/example3.c
@@ -20,7 +20,7 @@ int main(int argc, char *argv[])
     fclose(saved);
 
     if (!ann) {
-        printf("Error loading ANN from file.", save_name);
+        printf("Error loading ANN from file: %s.", save_name);
         exit(1);
     }