diff --git a/targets/zephyr/Makefile.zephyr b/targets/zephyr/Makefile.zephyr
index 3b5802998d..5ba081dc63 100644
--- a/targets/zephyr/Makefile.zephyr
+++ b/targets/zephyr/Makefile.zephyr
@@ -81,7 +81,7 @@ endif
 	 -DFEATURE_VALGRIND=OFF \
 	 -DFEATURE_PROFILE=$(JERRYPROFILE) \
 	 -DFEATURE_ERROR_MESSAGES=ON \
-	 -DCMAKE_BUILD_TYPE=Release \
+	 -DCMAKE_BUILD_TYPE=MinSizeRel \
 	 -DCMAKE_VERBOSE_MAKEFILE=$(V) \
 	 -DMEM_HEAP_SIZE_KB=$(JERRYHEAP) \
 	 -DEXTERNAL_CMAKE_C_COMPILER="$(subst ccache ,,$(CC))" \