diff --git a/configs/eagle100/README.txt b/configs/eagle100/README.txt
index b73714aeac..4afbe0664f 100644
--- a/configs/eagle100/README.txt
+++ b/configs/eagle100/README.txt
@@ -85,6 +85,10 @@ Eagle100-specific Configuration Options
 
 	   CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
 
+	CONFIG_ARCH_IRQPRIO - The LM3S6918 supports interrupt prioritization
+
+	   CONFIG_ARCH_IRQPRIO=y
+
 	CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to boards that
 	   have LEDs
 
diff --git a/configs/eagle100/ostest/defconfig b/configs/eagle100/ostest/defconfig
index 6abfc057d0..f30c50ff0b 100644
--- a/configs/eagle100/ostest/defconfig
+++ b/configs/eagle100/ostest/defconfig
@@ -50,6 +50,7 @@
 # CONFIG_DRAM_SIZE - Describes the installed DRAM.
 # CONFIG_DRAM_START - The start address of DRAM (physical)
 # CONFIG_DRAM_END - Last address+1 of installed RAM
+# CONFIG_ARCH_IRQPRIO - The LM3S6918 supports interrupt prioritization
 # CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt
 #   stack. If defined, this symbol is the size of the interrupt
 #   stack in bytes.  If not defined, the user task stacks will be
@@ -68,6 +69,7 @@ CONFIG_BOARD_LOOPSPERMSEC=16945
 CONFIG_DRAM_SIZE=0x00010000
 CONFIG_DRAM_START=0x00000000
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
+CONFIG_ARCH_IRQPRIO=y
 CONFIG_DRAM_NUTTXENTRY=0x00002000
 CONFIG_ARCH_INTERRUPTSTACK=n
 CONFIG_ARCH_STACKDUMP=y