diff --git a/libc/include/string.h b/libc/include/string.h
index 37a0f299..feed91a8 100644
--- a/libc/include/string.h
+++ b/libc/include/string.h
@@ -38,6 +38,9 @@ extern "C"
     /* Return a pointer to the first occurrence of the character c in str, or NULL if it could not be found. */
     char* strchr(const char* str, int c);
 
+    /* Return a pointer to the last occurrence of the character c in str, or NULL if it could not be found. */
+    char* strrchr(const char* str, int c);
+
     /* Return a heap-allocated copy of a string. */
     char* strdup(const char* str);