diff --git a/configs/sama5d3x-ek/ostest/defconfig b/configs/sama5d3x-ek/ostest/defconfig
index 2247c273399..3b8fa9df152 100644
--- a/configs/sama5d3x-ek/ostest/defconfig
+++ b/configs/sama5d3x-ek/ostest/defconfig
@@ -201,7 +201,7 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 # CONFIG_ARCH_CALIBRATION is not set
 CONFIG_DRAM_START=0x20000000
 CONFIG_DRAM_VSTART=0x20000000
-CONFIG_DRAM_SIZE=131072
+CONFIG_DRAM_SIZE=114688
 CONFIG_ARCH_HAVE_INTERRUPTSTACK=y
 CONFIG_ARCH_INTERRUPTSTACK=0