diff --git a/photon/libc/include/assert.h b/photon/libc/include/assert.h
new file mode 100644
index 0000000..c1b23b6
--- /dev/null
+++ b/photon/libc/include/assert.h
@@ -0,0 +1,8 @@
+#ifndef PHOTON_ASSERT_H_
+#define PHOTON_ASSERT_H_
+
+#define assert(x) if (!(x)) { __assert_fail(#x, __FUNCTION__, __FILE__, __LINE__); }
+
+extern void _Noreturn __assert_fail(const char *, const char *, const char *, int);
+
+#endif
diff --git a/photon/libc/stdlib/assert.c b/photon/libc/stdlib/assert.c
new file mode 100644
index 0000000..3c8dde4
--- /dev/null
+++ b/photon/libc/stdlib/assert.c
@@ -0,0 +1,8 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+extern void _Noreturn __assert_fail(const char *exp, const char *func, const char *file, int line)
+{
+    printf("Assertion failed: (%s), function %s, file %s, line %d\n", exp, func, file, line);
+    abort();
+}