diff --git a/src/pages.c b/src/pages.c
index 9846e19e..fa986ba6 100644
--- a/src/pages.c
+++ b/src/pages.c
@@ -180,15 +180,15 @@ pages_purge_lazy(void *addr, size_t size) {
 
 #ifdef _WIN32
 	VirtualAlloc(addr, size, MEM_RESET, PAGE_READWRITE);
+	return false;
 #elif defined(JEMALLOC_PURGE_MADVISE_FREE)
-	madvise(addr, size, MADV_FREE);
+	return (madvise(addr, size, MADV_FREE) != 0);
 #elif defined(JEMALLOC_PURGE_MADVISE_DONTNEED) && \
     !defined(JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS)
-	madvise(addr, size, MADV_DONTNEED);
+	return (madvise(addr, size, MADV_DONTNEED) != 0);
 #else
 	not_reached();
 #endif
-	return false;
 }
 
 bool