diff --git a/pkg/u8g2/doc.txt b/pkg/u8g2/doc.txt
index 459b9b1ce7..78da76c0fa 100644
--- a/pkg/u8g2/doc.txt
+++ b/pkg/u8g2/doc.txt
@@ -3,4 +3,16 @@
  * @ingroup  pkg
  * @brief    Provides a monochrome graphics library for OLED and LCD displays
  * @see      https://github.com/olikraus/u8g2
- */
\ No newline at end of file
+ *
+ * ## Requirements
+ *
+ * Using SDL requires more stack so in case you are using it add
+ *
+ * ```makefile
+ * CFLAGS += '-DTHREAD_STACKSIZE_MAIN= 48*1024'
+ * ```
+ *
+ * to your makefile.
+ * 48kB is enough for the test other uses may need more or may
+ * need this to be applied to other threads using `THREAD_STACKSIZE_DEFAULT`
+ */
diff --git a/tests/pkg_u8g2/Makefile b/tests/pkg_u8g2/Makefile
index 455664ad96..baa1cfca57 100644
--- a/tests/pkg_u8g2/Makefile
+++ b/tests/pkg_u8g2/Makefile
@@ -30,6 +30,8 @@ ifeq ($(TEST_OUTPUT),1)
 endif
 
 ifeq ($(TEST_OUTPUT),2)
+# SDL requires more stack
+  CFLAGS += -DTHREAD_STACKSIZE_MAIN=48*1024
   USEMODULE += u8g2_sdl
 endif