diff --git a/include/haproxy/defaults.h b/include/haproxy/defaults.h
index 3a87c1bff..13b5ad3fc 100644
--- a/include/haproxy/defaults.h
+++ b/include/haproxy/defaults.h
@@ -371,7 +371,7 @@
 
 /* default per-thread pool cache size when enabled */
 #ifndef CONFIG_HAP_POOL_CACHE_SIZE
-#define CONFIG_HAP_POOL_CACHE_SIZE 524288
+#define CONFIG_HAP_POOL_CACHE_SIZE 1048576
 #endif
 
 /* Number of samples used to compute the times reported in stats. A power of