diff --git a/src/builtin.c b/src/builtin.c
index 1c6b08c..407df2a 100644
--- a/src/builtin.c
+++ b/src/builtin.c
@@ -1,5 +1,6 @@
 #define _BSD_SOURCE
 #define _GNU_SOURCE
+#define _DEFAULT_SOURCE
 #ifndef __sun__
 # define _XOPEN_SOURCE
 # define _XOPEN_SOURCE_EXTENDED 1
diff --git a/src/jv_dtoa.c b/src/jv_dtoa.c
index 33feb99..fcbd902 100644
--- a/src/jv_dtoa.c
+++ b/src/jv_dtoa.c
@@ -2327,7 +2327,7 @@ retlow1:
 jvp_strtod
  (struct dtoa_context* C, const char *s00, char **se)
 {
-	int bb2, bb5, bbe, bd2, bd5, bbbits, bs2, c, e, e1, test_scale;
+	int bb2, bb5, bbe, bd2, bd5, bbbits, bs2, c, e, e1;
 	int esign, i, j, k, nd, nd0, nf, nz, nz0, nz1, sign;
 	CONST char *s, *s0, *s1;
 	double aadj, aadj1;
diff --git a/src/jv_dtoa_tsd.c b/src/jv_dtoa_tsd.c
index cfccd40..d39911e 100644
--- a/src/jv_dtoa_tsd.c
+++ b/src/jv_dtoa_tsd.c
@@ -31,7 +31,7 @@ void jv_tsd_dtoa_ctx_fini() {
 static
 #endif
 void jv_tsd_dtoa_ctx_init() {
-  if (pthread_key_create(&dtoa_ctx_key, tsd_dtoa_ctx_dtor) != 0) {
+  if (pthread_key_create(&dtoa_ctx_key, (void (*)(void *))tsd_dtoa_ctx_dtor) != 0) {
     fprintf(stderr, "error: cannot create thread specific key");
     abort();
   }