diff --git a/xyntax.c b/xyntax.c
index 87f9b98..eb56a89 100644
--- a/xyntax.c
+++ b/xyntax.c
@@ -164,7 +164,7 @@ void syntax_define_default (int case_sensitive, int string_colour, int string_ef
 }
 
 void syntax_define_words (char * * word_array, int word_count, int word_colour, int word_effect) {
-	int word = 0;
+	int word;
 
 	for (word = 0; word != word_count; ++word) {
 		(void) syntax_define (0, 1, word_array [word], syntax_separator, '\0', word_colour, word_effect);
diff --git a/xyntax.h b/xyntax.h
index a0f79d1..9b93b87 100644
--- a/xyntax.h
+++ b/xyntax.h
@@ -19,24 +19,22 @@ extern int    * syntax_colour;
 extern int    * syntax_effect;
 extern char   * syntax_separator;
 
-extern int syntax_define (int, int, char *, char *, char, int, int);
+extern int syntax_define (int enrange, int derange, char * begin, char * end, char escape, int colour, int effect);
 
-extern int syntax_select (char *, int *);
+extern int syntax_select (char * string, int * length);
 
 extern void syntax_delete (void);
 
 /* Simplification... */
 
-extern void syntax_define_style (int *, int *);
+extern void syntax_define_separators (char * separator);
 
-extern void syntax_define_separators (char *);
+extern void syntax_define_default (int case_sensitive, int string_colour, int string_effect, int number_colour, int number_effect);
 
-extern void syntax_define_default (int, int, int, int, int);
+extern void syntax_define_words (char * * word_array, int word_count, int word_colour, int word_effect);
 
-extern void syntax_define_words (char * *, int, int, int);
+extern void syntax_define_range (char * range_begin, char * range_end, char range_escape, int range_colour, int range_effect);
 
-extern void syntax_define_range (char *, char *, char, int, int);
-
-extern void syntax_define_operators (char *, int, int);
+extern void syntax_define_operators (char * operator_array, int operator_colour, int operator_effect);
 
 #endif