diff --git a/package/libsndfile/libsndfile.mk b/package/libsndfile/libsndfile.mk
index 69530c98ed..c955b9d088 100644
--- a/package/libsndfile/libsndfile.mk
+++ b/package/libsndfile/libsndfile.mk
@@ -15,6 +15,7 @@ LIBSNDFILE_CPE_ID_VENDOR = libsndfile_project
 # disputed, https://github.com/erikd/libsndfile/issues/398
 LIBSNDFILE_IGNORE_CVES += CVE-2018-13419
 
+LIBSNDFILE_CONF_ENV = ac_cv_prog_cc_c99='-std=gnu99'
 LIBSNDFILE_CONF_OPTS = \
 	--disable-sqlite \
 	--disable-alsa \