diff --git a/src/haproxy.c b/src/haproxy.c
index 130bc9b35..203897b73 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -2347,7 +2347,7 @@ static void init(int argc, char **argv)
 		int64_t mem = global.rlimit_memmax * 1048576ULL;
 		int64_t sslmem;
 
-		mem -= global.tune.sslcachesize * 200; // about 200 bytes per SSL cache entry
+		mem -= global.tune.sslcachesize * 200ULL; // about 200 bytes per SSL cache entry
 		mem -= global.maxzlibmem;
 		mem = mem * MEM_USABLE_RATIO;
 
@@ -2380,7 +2380,7 @@ static void init(int argc, char **argv)
 		int retried = 0;
 
 		if (global.ssl_used_frontend || global.ssl_used_backend)
-			mem -= global.tune.sslcachesize * 200; // about 200 bytes per SSL cache entry
+			mem -= global.tune.sslcachesize * 200ULL; // about 200 bytes per SSL cache entry
 
 		mem -= global.maxzlibmem;
 		mem = mem * MEM_USABLE_RATIO;