diff --git a/tests/helper-methods.c b/tests/helper-methods.c
index e3dc33e..28c6203 100644
--- a/tests/helper-methods.c
+++ b/tests/helper-methods.c
@@ -45,14 +45,14 @@ int compare_files(char expected_output_filename[],char actual_output_filename[]
   fseek(expected_output_fh, 0L, SEEK_END);
   numbytes = ftell(expected_output_fh);
   fseek(expected_output_fh, 0L, SEEK_SET);	
-  expected_buffer = (char*)calloc(numbytes, sizeof(char));	
+  expected_buffer = (char*)calloc(numbytes +1, sizeof(char));	
   fsize_expected = fread(expected_buffer, sizeof(char), numbytes, expected_output_fh);
   fclose(expected_output_fh);
   
   fseek(actual_output_fh, 0L, SEEK_END);
   numbytes = ftell(actual_output_fh);
   fseek(actual_output_fh, 0L, SEEK_SET);	
-  actual_buffer = (char*)calloc(numbytes, sizeof(char));	
+  actual_buffer = (char*)calloc(numbytes +1, sizeof(char));	
   fsize_actual = fread(actual_buffer, sizeof(char), numbytes, actual_output_fh);
   fclose(actual_output_fh);