diff --git a/nsprpub/pr/src/misc/prdtoa.c b/nsprpub/pr/src/misc/prdtoa.c
index a10ffaf3ea1..e1507dfabdb 100644
--- a/nsprpub/pr/src/misc/prdtoa.c
+++ b/nsprpub/pr/src/misc/prdtoa.c
@@ -2673,7 +2673,7 @@ nrv_alloc(char *s, char **rve, int n)
  * when MULTIPLE_THREADS is not defined.
  */
 
- void
+ static void
 #ifdef KR_headers
 freedtoa(s) char *s;
 #else