diff --git a/lib/x86/fault_test.c b/lib/x86/fault_test.c
index 078dae3..e15a218 100644
--- a/lib/x86/fault_test.c
+++ b/lib/x86/fault_test.c
@@ -1,6 +1,6 @@
 #include "fault_test.h"
 
-jmp_buf jmpbuf;
+static jmp_buf jmpbuf;
 
 static void restore_exec_to_jmpbuf(void)
 {
diff --git a/lib/x86/usermode.c b/lib/x86/usermode.c
index f01ad9b..f032523 100644
--- a/lib/x86/usermode.c
+++ b/lib/x86/usermode.c
@@ -14,7 +14,7 @@
 #define USERMODE_STACK_SIZE	0x2000
 #define RET_TO_KERNEL_IRQ	0x20
 
-jmp_buf jmpbuf;
+static jmp_buf jmpbuf;
 
 static void restore_exec_to_jmpbuf(void)
 {