diff --git a/Kconfig b/Kconfig
index 112745440b..678317e4d3 100644
--- a/Kconfig
+++ b/Kconfig
@@ -248,7 +248,7 @@ config SYS_MALLOC_F_LEN
 	hex "Size of malloc() pool before relocation"
 	depends on SYS_MALLOC_F
 	default 0x1000 if AM33XX
-	default 0x4000 if SANDBOX
+	default 0x4000 if SANDBOX || RISCV
 	default 0x2000 if (ARCH_IMX8 || ARCH_IMX8M || ARCH_MX7 || \
 			   ARCH_MX7ULP || ARCH_MX6 || ARCH_MX5 || \
 			   ARCH_LS1012A || ARCH_LS1021A || ARCH_LS1043A || \
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index ba29e70acf..78e964db12 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -195,9 +195,6 @@ config ANDES_PLIC
 	  The Andes PLIC block holds memory-mapped claim and pending registers
 	  associated with software interrupt.
 
-config SYS_MALLOC_F_LEN
-	default 0x1000
-
 config SMP
 	bool "Symmetric Multi-Processing"
 	depends on SBI_V01 || !RISCV_SMODE