diff --git a/src/linux/dup3.c b/src/linux/dup3.c
index e201ef01574c07652900ee7bfb4354d482c88978..18f6fccef24fb12fdc83a72958d3423618ae7a1d 100644
--- a/src/linux/dup3.c
+++ b/src/linux/dup3.c
@@ -4,7 +4,7 @@
 #include "syscall.h"
 
 int dup3(int old, int new, int flags) {
-        int r;
-        while ((r=__syscall(SYS_dup3, old, new, flags))==-EBUSY);
-        return __syscall_ret(r);
+	int r;
+	while ((r=__syscall(SYS_dup3, old, new, flags))==-EBUSY);
+	return __syscall_ret(r);
 }
diff --git a/src/linux/setns.c b/src/linux/setns.c
index af3eb092f5a8382a7ce4fb5962cdcfbad136ec90..7029b7480571fd6614eeca5f93ca416ebbb17149 100644
--- a/src/linux/setns.c
+++ b/src/linux/setns.c
@@ -5,5 +5,5 @@
 
 int setns(int fd, int nstype)
 {
-        return syscall(SYS_setns, fd, nstype);
+	return syscall(SYS_setns, fd, nstype);
 }
diff --git a/src/thread/x86_64/__set_thread_area.s b/src/thread/x86_64/__set_thread_area.s
index cc538e52e23e6c3fefcf5eb6a3802a1e3729cdfe..f3ff4f61bf321fe2e8a2cde92e02a57b01847ed4 100644
--- a/src/thread/x86_64/__set_thread_area.s
+++ b/src/thread/x86_64/__set_thread_area.s
@@ -3,8 +3,8 @@
 .global __set_thread_area
 .type __set_thread_area,@function
 __set_thread_area:
-        mov %rdi,%rsi           /* shift for syscall */
-        movl $0x1002,%edi       /* SET_FS register */
-        movl $158,%eax          /* set fs segment to */
-        syscall                 /* arch_prctl(SET_FS, arg)*/
+	mov %rdi,%rsi           /* shift for syscall */
+	movl $0x1002,%edi       /* SET_FS register */
+	movl $158,%eax          /* set fs segment to */
+	syscall                 /* arch_prctl(SET_FS, arg)*/
 	ret
diff --git a/src/unistd/acct.c b/src/unistd/acct.c
index 93847127cabf71f4e158ca85ab73d4167c6836f5..f6f25a8a62de67e53f34ecc1a9774f608a7dd7e7 100644
--- a/src/unistd/acct.c
+++ b/src/unistd/acct.c
@@ -5,5 +5,5 @@
 
 int acct(const char *filename)
 {
-        return syscall(SYS_acct, filename);
+	return syscall(SYS_acct, filename);
 }