diff --git a/core/ContextBase.cpp b/core/ContextBase.cpp
index 28109bb0..f046baaf 100644
--- a/core/ContextBase.cpp
+++ b/core/ContextBase.cpp
@@ -111,7 +111,7 @@ void ContextBase::readConfig()
         mGps_conf.GPS_LOCK = GNSS_CONFIG_GPS_LOCK_MO_AND_NI;
         mGps_conf.SUPL_VER = 0x10000;
         mGps_conf.SUPL_MODE = 0x1;
-        mGps_conf.SUPL_ES = 0;
+        mGps_conf.SUPL_ES = 1;
         mGps_conf.SUPL_HOST[0] = 0;
         mGps_conf.SUPL_PORT = 0;
         mGps_conf.CAPABILITIES = 0x7;
diff --git a/etc/gps.conf b/etc/gps.conf
index a5dabb2d..577c7b07 100644
--- a/etc/gps.conf
+++ b/etc/gps.conf
@@ -35,7 +35,7 @@ INTERMEDIATE_POS=0
 SUPL_VER=0x10000
 
 # Emergency SUPL, 1=enable, 0=disable
-#SUPL_ES=0
+#SUPL_ES=1
 
 #Choose PDN for Emergency SUPL
 #1 - Use emergency PDN