diff --git a/Userland/Libraries/LibC/CMakeLists.txt b/Userland/Libraries/LibC/CMakeLists.txt
index be6145dcf2..9c9fe32be6 100644
--- a/Userland/Libraries/LibC/CMakeLists.txt
+++ b/Userland/Libraries/LibC/CMakeLists.txt
@@ -9,6 +9,7 @@ set(LIBC_SOURCES
     fenv.cpp
     getopt.cpp
     grp.cpp
+    inttypes.cpp
     ioctl.cpp
     libcinit.cpp
     libgen.cpp
diff --git a/Userland/Libraries/LibC/inttypes.cpp b/Userland/Libraries/LibC/inttypes.cpp
new file mode 100644
index 0000000000..87bbb7d024
--- /dev/null
+++ b/Userland/Libraries/LibC/inttypes.cpp
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2021, Mițca Dumitru <dumitru0mitca@gmail.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <inttypes.h>
+
+extern "C" {
+
+imaxdiv_t imaxdiv(intmax_t numerator, intmax_t denominator)
+{
+    imaxdiv_t result;
+    result.quot = numerator / denominator;
+    result.rem = numerator % denominator;
+
+    if (numerator >= 0 && result.rem < 0) {
+        result.quot++;
+        result.rem -= denominator;
+    }
+
+    return result;
+}
+}
diff --git a/Userland/Libraries/LibC/inttypes.h b/Userland/Libraries/LibC/inttypes.h
index b983f16699..fc301d5407 100644
--- a/Userland/Libraries/LibC/inttypes.h
+++ b/Userland/Libraries/LibC/inttypes.h
@@ -27,6 +27,9 @@
 #pragma once
 
 #include <bits/stdint.h>
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
 
 #define PRId8 "d"
 #define PRId16 "d"
@@ -68,3 +71,11 @@
 
 #define SCNu64 __PRI64_PREFIX "u"
 #define SCNd64 __PRI64_PREFIX "d"
+
+typedef struct imaxdiv_t {
+    intmax_t quot;
+    intmax_t rem;
+} imaxdiv_t;
+imaxdiv_t imaxdiv(intmax_t, intmax_t);
+
+__END_DECLS
diff --git a/Userland/Libraries/LibC/stdlib.cpp b/Userland/Libraries/LibC/stdlib.cpp
index 0b599202a8..2ce2391646 100644
--- a/Userland/Libraries/LibC/stdlib.cpp
+++ b/Userland/Libraries/LibC/stdlib.cpp
@@ -836,6 +836,19 @@ ldiv_t ldiv(long numerator, long denominator)
     return result;
 }
 
+lldiv_t lldiv(long long numerator, long long denominator)
+{
+    lldiv_t result;
+    result.quot = numerator / denominator;
+    result.rem = numerator % denominator;
+
+    if (numerator >= 0 && result.rem < 0) {
+        result.quot++;
+        result.rem -= denominator;
+    }
+    return result;
+}
+
 size_t mbstowcs(wchar_t*, const char*, size_t)
 {
     dbgln("FIXME: Implement mbstowcs()");
diff --git a/Userland/Libraries/LibC/stdlib.h b/Userland/Libraries/LibC/stdlib.h
index 4aa7c5bab0..77b763bfb2 100644
--- a/Userland/Libraries/LibC/stdlib.h
+++ b/Userland/Libraries/LibC/stdlib.h
@@ -102,6 +102,11 @@ typedef struct {
     long rem;
 } ldiv_t;
 ldiv_t ldiv(long, long);
+typedef struct {
+    long long quot;
+    long long rem;
+} lldiv_t;
+lldiv_t lldiv(long long, long long);
 
 int posix_openpt(int flags);
 int grantpt(int fd);