diff --git a/src/configure.in b/src/configure.in
index 3cf47edc..ef5463ff 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -566,7 +566,7 @@ AC_ARG_WITH(tls,
                            #include <unistd.h>
                            extern __thread int i;
                            static int res1, res2;
-                           void thread_main (void *arg) {
+                           void *thread_main (void *arg) {
                              i = (int)arg;
                              sleep (1);
                              if ((int)arg == 1)
diff --git a/src/libpfm4/lib/pfmlib_common.c b/src/libpfm4/lib/pfmlib_common.c
index 335155e2..38f3f957 100644
--- a/src/libpfm4/lib/pfmlib_common.c
+++ b/src/libpfm4/lib/pfmlib_common.c
@@ -1749,7 +1749,7 @@ pfmlib_pmu_validate_encoding(pfmlib_pmu_t *pmu, FILE *fp)
 	pfmlib_event_attr_info_t ainfo;
 	char *buf;
 	size_t maxlen = 0, len;
-	int i, u, n = 0, um;
+	int i, u, um;
 	int ret, retval = PFM_SUCCESS;
 
 	pfmlib_for_each_pmu_event(pmu, i) {
@@ -1838,7 +1838,6 @@ pfmlib_pmu_validate_encoding(pfmlib_pmu_t *pmu, FILE *fp)
 				continue;
 			}
 		}
-		n++;
 	}
 	free(buf);
 
-- 
2.27.0