diff --git a/configs/arduino-due/ostest/defconfig b/configs/arduino-due/ostest/defconfig
index b895ac3fdb6..fb6b4045f1f 100644
--- a/configs/arduino-due/ostest/defconfig
+++ b/configs/arduino-due/ostest/defconfig
@@ -215,7 +215,7 @@ CONFIG_ARCH_HAVE_RAMVECTORS=y
 CONFIG_BOARD_LOOPSPERMSEC=8720
 # CONFIG_ARCH_CALIBRATION is not set
 CONFIG_DRAM_START=0x20000000
-CONFIG_DRAM_SIZE=32768
+CONFIG_DRAM_SIZE=65536
 CONFIG_ARCH_HAVE_INTERRUPTSTACK=y
 CONFIG_ARCH_INTERRUPTSTACK=0