diff --git a/help.c b/help.c
index d3d3adcc5c..a08c645fd9 100644
--- a/help.c
+++ b/help.c
@@ -776,7 +776,9 @@ void get_version_info(struct strbuf *buf, int show_build_options)
 #if defined OPENSSL_VERSION_TEXT
 		strbuf_addf(buf, "OpenSSL: %s\n", OPENSSL_VERSION_TEXT);
 #endif
-#if defined ZLIB_VERSION
+#if defined ZLIBNG_VERSION
+		strbuf_addf(buf, "zlib-ng: %s\n", ZLIBNG_VERSION);
+#elif defined ZLIB_VERSION
 		strbuf_addf(buf, "zlib: %s\n", ZLIB_VERSION);
 #endif
 	}
diff --git a/t/t0091-bugreport.sh b/t/t0091-bugreport.sh
index e11d819b62..e38ca7a901 100755
--- a/t/t0091-bugreport.sh
+++ b/t/t0091-bugreport.sh
@@ -47,7 +47,8 @@ test_expect_success 'sanity check "System Info" section' '
 	# This is bound to differ from environment to environment,
 	# so we just do some rather high-level checks.
 	grep "uname: ." system &&
-	grep "compiler info: ." system
+	grep "compiler info: ." system &&
+	grep "zlib." system
 '
 
 test_expect_success 'dies if file with same name as report already exists' '