diff --git a/libc/CMakeLists.txt b/libc/CMakeLists.txt
index 331380c0..11823c69 100644
--- a/libc/CMakeLists.txt
+++ b/libc/CMakeLists.txt
@@ -8,6 +8,7 @@ set(SOURCES
     src/errno.cpp
     src/string.cpp
     src/atexit.cpp
+    src/ctype.cpp
 )
 
 if(${ARCH} STREQUAL "x86_64")
diff --git a/libc/include/ctype.h b/libc/include/ctype.h
new file mode 100644
index 00000000..c5a96941
--- /dev/null
+++ b/libc/include/ctype.h
@@ -0,0 +1,31 @@
+/* ctype.h: Character handling functions. */
+
+#ifndef _CTYPE_H
+#define _CTYPE_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    int isalnum(int c);
+    int isalpha(int c);
+    int isascii(int c);
+    int iscntrl(int c);
+    int isdigit(int c);
+    int isxdigit(int c);
+    int isspace(int c);
+    int ispunct(int c);
+    int isprint(int c);
+    int isgraph(int c);
+    int islower(int c);
+    int isupper(int c);
+    int isblank(int c);
+    int tolower(int c);
+    int toupper(int c);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/libc/src/ctype.cpp b/libc/src/ctype.cpp
new file mode 100644
index 00000000..daec56d5
--- /dev/null
+++ b/libc/src/ctype.cpp
@@ -0,0 +1,31 @@
+#include <ctype.h>
+#include <luna/CType.h>
+
+#define ctype_wrapper(a, b)                                                                                            \
+    int a(int c)                                                                                                       \
+    {                                                                                                                  \
+        return b(c);                                                                                                   \
+    }
+
+// clang-format off
+
+extern "C"
+{
+    ctype_wrapper(isalnum, _isalnum)
+    ctype_wrapper(isalpha, _isalpha)
+    ctype_wrapper(isascii, _isascii)
+    ctype_wrapper(iscntrl, _iscntrl)
+    ctype_wrapper(isdigit, _isdigit)
+    ctype_wrapper(isxdigit, _isxdigit)
+    ctype_wrapper(isspace, _isspace)
+    ctype_wrapper(ispunct, _ispunct)
+    ctype_wrapper(isprint, _isprint)
+    ctype_wrapper(isgraph, _isgraph)
+    ctype_wrapper(islower, _islower)
+    ctype_wrapper(isupper, _isupper)
+    ctype_wrapper(isblank, _isblank)
+    ctype_wrapper(tolower, _tolower)
+    ctype_wrapper(toupper, _toupper)
+}
+
+// clang-format on