diff --git a/nawk/main.c b/nawk/main.c
index 9666638..b50b283 100644
--- a/nawk/main.c
+++ b/nawk/main.c
@@ -66,7 +66,7 @@ int	mb_cur_max;	/* MB_CUR_MAX, for acceleration */
 
 extern const char badopen[];
 
-int main(int argc, unsigned char *argv[], unsigned char *envp[])
+int main(int argc, char *argv[], char *envp[])
 {
 	unsigned char *fs = NULL;
 	char label[MAXLABEL+1];	/* Space for the catalogue label */