diff --git a/projects/generic/linux/linux.i386.conf b/projects/generic/linux/linux.i386.conf
index e97c484fae..97fdf6c200 100644
--- a/projects/generic/linux/linux.i386.conf
+++ b/projects/generic/linux/linux.i386.conf
@@ -315,7 +315,7 @@ CONFIG_X86_RESERVE_LOW_64K=y
 # CONFIG_MATH_EMULATION is not set
 CONFIG_MTRR=y
 CONFIG_MTRR_SANITIZER=y
-CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=0
+CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1
 CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
 # CONFIG_X86_PAT is not set
 CONFIG_EFI=y
diff --git a/projects/jetway_j7f5m/linux/linux.i386.conf b/projects/jetway_j7f5m/linux/linux.i386.conf
index 07ba42cdd9..bb04c21b3f 100644
--- a/projects/jetway_j7f5m/linux/linux.i386.conf
+++ b/projects/jetway_j7f5m/linux/linux.i386.conf
@@ -295,7 +295,7 @@ CONFIG_X86_RESERVE_LOW_64K=y
 # CONFIG_MATH_EMULATION is not set
 CONFIG_MTRR=y
 CONFIG_MTRR_SANITIZER=y
-CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=0
+CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1
 CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
 # CONFIG_X86_PAT is not set
 CONFIG_EFI=y