diff --git a/kernel.nix b/kernel.nix
index 6748ba1..a637657 100644
--- a/kernel.nix
+++ b/kernel.nix
@@ -4770,7 +4770,6 @@ in buildLinux {
     "DMA_REMAP" = yes;
     "DMA_DIRECT_REMAP" = yes;
     "DMA_CMA" = yes;
-    "CMA_SIZE_MBYTES" = freeform "128";
     "CMA_SIZE_SEL_MBYTES" = yes;
     "CMA_ALIGNMENT" = freeform "8";
     "SGL_ALLOC" = yes;