diff --git a/board/xilinx/versal/board.c b/board/xilinx/versal/board.c
index 2e2807eee4..a88f5bb177 100644
--- a/board/xilinx/versal/board.c
+++ b/board/xilinx/versal/board.c
@@ -256,6 +256,9 @@ ulong board_get_usable_ram_top(ulong total_size)
 	phys_addr_t reg;
 	struct lmb lmb;
 
+	if (!total_size)
+		return gd->ram_top;
+
 	/* found enough not-reserved memory to relocated U-Boot */
 	lmb_init(&lmb);
 	lmb_add(&lmb, gd->ram_base, gd->ram_size);
diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index 41ecc9559c..e311aa772c 100644
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -516,6 +516,9 @@ ulong board_get_usable_ram_top(ulong total_size)
 	phys_addr_t reg;
 	struct lmb lmb;
 
+	if (!total_size)
+		return gd->ram_top;
+
 	if (!IS_ALIGNED((ulong)gd->fdt_blob, 0x8))
 		panic("Not 64bit aligned DT location: %p\n", gd->fdt_blob);