diff --git a/meta-digi-dey/recipes-qt/qt5/qtbase/ccimx6ul/0001-gcc-base.conf-optimize-for-size.patch b/meta-digi-dey/recipes-qt/qt5/qtbase/ccimx6ul/0001-gcc-base.conf-optimize-for-size.patch
new file mode 100644
index 000000000..7ad545e8a
--- /dev/null
+++ b/meta-digi-dey/recipes-qt/qt5/qtbase/ccimx6ul/0001-gcc-base.conf-optimize-for-size.patch
@@ -0,0 +1,24 @@
+From: Javier Viguera <javier.viguera@digi.com>
+Date: Thu, 3 Aug 2017 15:21:21 +0200
+Subject: [PATCH] gcc-base.conf: optimize for size
+
+Signed-off-by: Javier Viguera <javier.viguera@digi.com>
+---
+ mkspecs/common/gcc-base.conf | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/mkspecs/common/gcc-base.conf b/mkspecs/common/gcc-base.conf
+index 6e043f558f1c..e77fb93326d4 100644
+--- a/mkspecs/common/gcc-base.conf
++++ b/mkspecs/common/gcc-base.conf
+@@ -31,8 +31,8 @@
+ # you can use the manual test in tests/manual/mkspecs.
+ #
+ 
+-QMAKE_CFLAGS_OPTIMIZE      = -O2
+-QMAKE_CFLAGS_OPTIMIZE_FULL = -O3
++QMAKE_CFLAGS_OPTIMIZE      = -Os
++QMAKE_CFLAGS_OPTIMIZE_FULL = -Os
+ 
+ QMAKE_CFLAGS               += -pipe
+ QMAKE_CFLAGS_DEPS          += -M
diff --git a/meta-digi-dey/recipes-qt/qt5/qtbase_%.bbappend b/meta-digi-dey/recipes-qt/qt5/qtbase_%.bbappend
index b4012bc2b..58da3e060 100644
--- a/meta-digi-dey/recipes-qt/qt5/qtbase_%.bbappend
+++ b/meta-digi-dey/recipes-qt/qt5/qtbase_%.bbappend
@@ -3,6 +3,7 @@
 FILESEXTRAPATHS_prepend := "${THISDIR}/${BPN}:"
 
 SRC_URI_append = " file://qt5.sh"
+SRC_URI_append_ccimx6ul = " file://0001-gcc-base.conf-optimize-for-size.patch"
 
 PACKAGECONFIG_append = " accessibility examples fontconfig sql-sqlite"
 PACKAGECONFIG_append_ccimx6 = " icu"