diff --git a/include/zmalloc.h b/include/zmalloc.h
index eaeb765..383f377 100644
--- a/include/zmalloc.h
+++ b/include/zmalloc.h
@@ -48,8 +48,7 @@
 #elif defined(USE_JEMALLOC)
 #define ZMALLOC_LIB ("jemalloc-" __xstr(JEMALLOC_VERSION_MAJOR) "." __xstr(JEMALLOC_VERSION_MINOR) "." __xstr(JEMALLOC_VERSION_BUGFIX))
 #include <jemalloc/jemalloc.h>
-// #if (JEMALLOC_VERSION_MAJOR == 2 && JEMALLOC_VERSION_MINOR >= 1) || (JEMALLOC_VERSION_MAJOR > 2)
-#if JEMALLOC_VERSION_MAJOR > 2
+#if (JEMALLOC_VERSION_MAJOR == 2 && JEMALLOC_VERSION_MINOR >= 1) || (JEMALLOC_VERSION_MAJOR > 2)
 #define HAVE_MALLOC_SIZE 1
 #define zmalloc_size(p) je_malloc_usable_size(p)
 #else