diff --git a/openpower/configs/hostboot/witherspoon.config b/openpower/configs/hostboot/witherspoon.config
index 8777ea9..870b34f 100755
--- a/openpower/configs/hostboot/witherspoon.config
+++ b/openpower/configs/hostboot/witherspoon.config
@@ -41,7 +41,7 @@
 set CONSOLE
 set BMC_AST2500
 
-set DISABLE_HOSTBOOT_RUNTIME
+unset DISABLE_HOSTBOOT_RUNTIME
 
 # Compile in hostboot runtime PRD
 set HBRT_PRD
diff --git a/openpower/configs/hostboot/zaius.config b/openpower/configs/hostboot/zaius.config
index 099e62c..bc87d42 100755
--- a/openpower/configs/hostboot/zaius.config
+++ b/openpower/configs/hostboot/zaius.config
@@ -41,7 +41,7 @@
 set CONSOLE
 set BMC_AST2500
 
-set DISABLE_HOSTBOOT_RUNTIME
+unset DISABLE_HOSTBOOT_RUNTIME
 
 # Compile in hostboot runtime PRD
 set HBRT_PRD