diff --git a/package/qdecoder/qdecoder.mk b/package/qdecoder/qdecoder.mk
index 506d975a6c..bbbf42a98c 100644
--- a/package/qdecoder/qdecoder.mk
+++ b/package/qdecoder/qdecoder.mk
@@ -8,6 +8,9 @@ QDECODER_VERSION = r12.0.5
 QDECODER_SITE = $(call github,wolkykim,qdecoder,$(QDECODER_VERSION))
 QDECODER_LICENSE = BSD-2
 QDECODER_LICENSE_FILES = COPYING
+# we patch configure.ac
+QDECODER_AUTORECONF = YES
+QDECODER_CONF_ENV = ac_cv_prog_cc_c99='-std=gnu99'
 
 QDECODER_INSTALL_STAGING = YES