diff --git a/configure/os/CONFIG_SITE.linux-x86.Common b/configure/os/CONFIG_SITE.linux-x86.Common
index d766c075a..1f4980a27 100644
--- a/configure/os/CONFIG_SITE.linux-x86.Common
+++ b/configure/os/CONFIG_SITE.linux-x86.Common
@@ -54,6 +54,7 @@ CROSS_COMPILER_TARGET_ARCHS += eldk53-ppc4xxFP
 # Raspberry Pi
 CROSS_COMPILER_TARGET_ARCHS += raspbian-arm
 
-# RTEMS
-CROSS_COMPILER_TARGET_ARCHS += RTEMS49-pc386
+# RTEMS (Can only have 1 RTEMS major version in 1 EPICS installation
+# because they overwrite their header files.)
+#CROSS_COMPILER_TARGET_ARCHS += RTEMS49-pc386
 CROSS_COMPILER_TARGET_ARCHS += RTEMS51-pc686