diff --git a/arch/arm/src/armv7-m/Kconfig b/arch/arm/src/armv7-m/Kconfig
index 750229be19..b8c3cb8179 100644
--- a/arch/arm/src/armv7-m/Kconfig
+++ b/arch/arm/src/armv7-m/Kconfig
@@ -115,12 +115,18 @@ config ARMV7M_STACKCHECK
 	default n
 	depends on ARMV7M_HAVE_STACKCHECK
 	---help---
-		This check uses R10 to check for a stack overflow within each function
-		call. This has performances and code size impacts, but it will be able to
-		catch hard to find stack overflows.
+		This check uses R10 to check for a stack overflow within each
+		function call. This has performances and code size impacts, but it
+		will be able to catch hard to find stack overflows.
 
-		Currently only available only for the STM32 architecture.  The changes
-		are not complex and patches for other architectures will be accepted.
+		Currently only available only for the STM32, SAM3/4 and SAMA5D
+		architectures.  The changes are not complex and patches for
+		other architectures will be accepted.
+
+		This option requires that you are using a GCC toolchain and that
+		you also include -finstrument-functions in your CFLAGS when you
+		compile.  This addition to your CFLAGS should probably be added
+		to the definition of the CFFLAGS in your board Make.defs file.
 
 config ARMV7M_ITMSYSLOG
 	bool "ITM SYSLOG support"