diff --git a/srcpos.c b/srcpos.c
index 06ef06d..71a73b8 100644
--- a/srcpos.c
+++ b/srcpos.c
@@ -291,7 +291,7 @@
 }
 
 void
-srcpos_verror(struct srcpos *pos, char const *fmt, va_list va)
+srcpos_verror(struct srcpos *pos, const char *fmt, va_list va)
 {
        const char *srcstr;
 
@@ -303,7 +303,7 @@
 }
 
 void
-srcpos_error(struct srcpos *pos, char const *fmt, ...)
+srcpos_error(struct srcpos *pos, const char *fmt, ...)
 {
 	va_list va;
 
diff --git a/srcpos.h b/srcpos.h
index 7f0eaea..46ea08a 100644
--- a/srcpos.h
+++ b/srcpos.h
@@ -107,9 +107,9 @@
 extern char *srcpos_string(struct srcpos *pos);
 extern void srcpos_dump(struct srcpos *pos);
 
-extern void srcpos_verror(struct srcpos *pos, char const *, va_list va)
+extern void srcpos_verror(struct srcpos *pos, const char *, va_list va)
      __attribute__((format(printf, 2, 0)));
-extern void srcpos_error(struct srcpos *pos, char const *, ...)
+extern void srcpos_error(struct srcpos *pos, const char *, ...)
      __attribute__((format(printf, 2, 3)));
 
 extern void srcpos_set_line(char *f, int l);