diff --git a/Makefile b/Makefile
index e283d22..812ce22 100644
--- a/Makefile
+++ b/Makefile
@@ -139,9 +139,16 @@ DriverSources =	drivers/ata.c
 DriverObj=$(patsubst %.c,$(KOBJDIR)/%.o,$(DriverSources))
 DriverDep=$(patsubst %.c,$(KOBJDIR)/%.d,$(DriverSources))
 
+# Userspace sources
+UserSources =	user/test/test.c
+
+UserObj=$(patsubst %.c,$(KOBJDIR)/%.o,$(UserSources))
+UserDep=$(patsubst %.c,$(KOBJDIR)/%.d,$(UserSources))
+
 -include $(LibCDep)
 -include $(KernDep)
 -include $(DriverDep)
+-include $(UserDep)
 
 
 ## MISC MAKEFILE ------------------------------------------------------------- #
@@ -275,6 +282,12 @@ $(KOBJDIR)/drivers/ata.o: $(KALEIDDIR)/drivers/ata.c $(KALEIDDIR)/drivers/ata.as
 	@rm -f $@.1 $@.2
 	@echo ${CL2}[$@] ${CL}Compiled.${CL3}
 
+## USERSPACE SPECIAL RECIPES MAKEFILE ---------------------------------------- #
+
+$(KOBJDIR)/user/test/test.o: $(KALEIDDIR)/user/test/test.asm | $(KOBJDIR)
+	@mkdir -p $(shell dirname $@)
+	@$(ASM) $(ASMFLAGS) $(KALEIDDIR)/user/test/test.asm -o $@
+	@echo ${CL2}[$@] ${CL}Compiled.${CL3}
 
 ## DEPENDENCIES MAKEFILE ----------------------------------------------------- #
 
@@ -297,12 +310,12 @@ $(BINDIR)/kaleid: $(LOBJDIR)/kaleid.x86_64
 	$(BINDIR)/kaleid
 	@echo ${CL2}[$@] ${CL}Success.${CL3}
 
-$(LOBJDIR)/kaleid.x86_64: $(LibCObj) $(KernObj) $(DriverObj) \
+$(LOBJDIR)/kaleid.x86_64: $(LibCObj) $(KernObj) $(DriverObj) $(UserObj) \
 	$(LOBJDIR)/loader.o $(BUILDDIR)/kernel.ld
 	@echo ${CL2}[$@] ${NC}Linking kernel objects...${CL3}
 	@mkdir -p $(shell dirname $@)
 	@$(LD) $(LDFLAGS) -T $(BUILDDIR)/kernel.ld			\
-		$(LOBJDIR)/loader.o $(KernObj) $(DriverObj) $(LibCObj)	\
+		$(LOBJDIR)/loader.o $(KernObj) $(DriverObj) $(LibCObj) $(UserObj)	\
 		-o $(LOBJDIR)/kaleid.x86_64
 	@echo ${CL2}[$@] ${CL}Success.${CL3}
 
diff --git a/ProjectTree b/ProjectTree
index cec7fd2..63f33e2 100644
--- a/ProjectTree
+++ b/ProjectTree
@@ -165,16 +165,19 @@
 │   │   ├── bscan.c
 │   │   ├── bscroll.c
 │   │   └── bwrite.c
-│   └── libc
-│       ├── atoi.c
-│       ├── ctype.c
-│       ├── errno.c
-│       ├── itoa.c
-│       ├── mem.c
-│       ├── rand.c
-│       ├── sprintf.c
-│       ├── string.c
-│       └── strtol.c
+│   ├── libc
+│   │   ├── atoi.c
+│   │   ├── ctype.c
+│   │   ├── errno.c
+│   │   ├── itoa.c
+│   │   ├── mem.c
+│   │   ├── rand.c
+│   │   ├── sprintf.c
+│   │   ├── string.c
+│   │   └── strtol.c
+│   └── user
+│       └── test
+│           └── test.asm
 ├── AUTHORS
 ├── ChangeLog
 ├── COPYING
@@ -182,4 +185,4 @@
 ├── ProjectTree
 └── README.md
 
-39 directories, 118 files
+41 directories, 119 files
diff --git a/kaleid/user/test/test.asm b/kaleid/user/test/test.asm
new file mode 100644
index 0000000..808d813
--- /dev/null
+++ b/kaleid/user/test/test.asm
@@ -0,0 +1,39 @@
+;=----------------------------------------------------------------------------=;
+;                            OS on Kaleid                                      ;
+;                                                                              ;
+;   Desc: Usermode test code                                                   ;
+;                                                                              ;
+;                                                                              ;
+;   Copyright © 2018-2021 The OS/K Team                                        ;
+;                                                                              ;
+;   This file is part of OS/K.                                                 ;
+;                                                                              ;
+;   OS/K is free software: you can redistribute it and/or modify               ;
+;   it under the terms of the GNU General Public License as published by       ;
+;   the Free Software Foundation, either version 3 of the License, or          ;
+;   (at your option) any later version.                                        ;
+;                                                                              ;
+;   OS/K is distributed in the hope that it will be useful,                    ;
+;   but WITHOUT ANY WARRANTY; without even the implied warranty of             ;
+;   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              ;
+;   GNU General Public License for more details.                               ;
+;                                                                              ;
+;   You should have received a copy of the GNU General Public License          ;
+;   along with OS/K.  If not, see <https://www.gnu.org/licenses/>.             ;
+;=----------------------------------------------------------------------------=;
+
+[BITS 64]
+
+global UserTest
+global EndOfUser
+
+UserTest:
+    mov rdi, 13
+    int 0x80
+
+.clone:
+    nop
+    jmp .clone
+
+EndOfUser:
+    nop