diff --git a/CMakeLists.txt b/CMakeLists.txt
index 84fdb18..64155cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -77,6 +77,9 @@ set(SOURCES
   src/libc/ctype/toupper.c
   # errno
   src/libc/errno/errno.c
+  # inttypes
+  src/libc/inttypes/imaxabs.c
+  src/libc/inttypes/imaxdiv.c
   # locale
   src/libc/locale/setlocale.c
   src/libc/locale/localeconv.c
diff --git a/STATUS b/STATUS
index 10e883b..99f24af 100644
--- a/STATUS
+++ b/STATUS
@@ -47,8 +47,8 @@ DONE:       Function/symbol/macro is defined, builds, links, and is tested
 7.8 <inttypes.h>
     7.8.1   PRI* macros: LDEPS(*printf)
     7.8.1   SCN* macros: LDEPS(*scanf)
-    7.8.2.1 imaxabs: TODO
-    7.8.2.2 imaxdiv: TODO
+    7.8.2.1 imaxabs: TEST
+    7.8.2.2 imaxdiv: TEST
     7.8.2.3 strotimax strtoumax: TODO
     7.8.2.4 wcstoimax wcstoumax: TODO
 
diff --git a/include/inttypes.h b/include/inttypes.h
index d430c36..076b3f0 100644
--- a/include/inttypes.h
+++ b/include/inttypes.h
@@ -2,6 +2,7 @@
 # define __INTTYPES_H__
 
 #include <stdint.h>
+#include <stdlib.h>
 
 /* Hide by default in C++ (7.8.1§1.181) */
 #if !defined __cplusplus || defined __STDC_FORMAT_MACROS
@@ -231,4 +232,15 @@
 
 #endif /* !defined __cplusplus || defined __STDC_FORMAT_MACROS */
 
+/* Return type of imaxdiv. */
+typedef lldiv_t imaxdiv_t;
+
+/* Absolue value of an intmax_t. */
+extern intmax_t imaxabs(intmax_t __j);
+#define imaxabs llabs
+
+/* Integer division of intmax_t. */
+extern imaxdiv_t imaxdiv(intmax_t __num, intmax_t __denom);
+#define imaxdiv lldiv
+
 #endif /*__INTTYPES_H__*/
diff --git a/src/libc/inttypes/imaxabs.c b/src/libc/inttypes/imaxabs.c
new file mode 100644
index 0000000..4986448
--- /dev/null
+++ b/src/libc/inttypes/imaxabs.c
@@ -0,0 +1,8 @@
+#include <inttypes.h>
+#include <stdlib.h>
+#undef imaxabs
+
+intmax_t imaxabs(intmax_t j)
+{
+	return llabs(j);
+}
diff --git a/src/libc/inttypes/imaxdiv.c b/src/libc/inttypes/imaxdiv.c
new file mode 100644
index 0000000..f009a8a
--- /dev/null
+++ b/src/libc/inttypes/imaxdiv.c
@@ -0,0 +1,8 @@
+#include <inttypes.h>
+#include <stdlib.h>
+#undef imaxdiv
+
+imaxdiv_t imaxdiv(intmax_t num, intmax_t denom)
+{
+	return lldiv(num, denom);
+}