diff --git a/ports/mimxrt/boards/MIMXRT1011.ld b/ports/mimxrt/boards/MIMXRT1011.ld
index ab363bd56..0e961a494 100644
--- a/ports/mimxrt/boards/MIMXRT1011.ld
+++ b/ports/mimxrt/boards/MIMXRT1011.ld
@@ -27,8 +27,8 @@ dtcm_size           = 0x00008000;
 ocrm_start          = 0x20200000;
 ocrm_size           = 0x00010000;
 
-/* 20kiB stack. */
-__stack_size__ = 0x5000;
+/* 16kiB stack. */
+__stack_size__ = 0x4000;
 _estack = __StackTop;
 _sstack = __StackLimit;
 
diff --git a/ports/mimxrt/boards/MIMXRT1015.ld b/ports/mimxrt/boards/MIMXRT1015.ld
index 0237d348c..58b88e0fe 100644
--- a/ports/mimxrt/boards/MIMXRT1015.ld
+++ b/ports/mimxrt/boards/MIMXRT1015.ld
@@ -27,8 +27,8 @@ dtcm_size           = 0x00008000;
 ocrm_start          = 0x20200000;
 ocrm_size           = 0x00010000;
 
-/* 24kiB stack. */
-__stack_size__ = 0x5000;
+/* 16kiB stack. */
+__stack_size__ = 0x4000;
 _estack = __StackTop;
 _sstack = __StackLimit;