diff --git a/external/mariadb-connector-c/UnpackedTarball_mariadb-connector-c.mk b/external/mariadb-connector-c/UnpackedTarball_mariadb-connector-c.mk
index dbce7aec4bdd..3ba6bfef583f 100644
--- a/external/mariadb-connector-c/UnpackedTarball_mariadb-connector-c.mk
+++ b/external/mariadb-connector-c/UnpackedTarball_mariadb-connector-c.mk
@@ -27,6 +27,7 @@ $(eval $(call gb_UnpackedTarball_set_patchlevel,mariadb-connector-c,1))
 
 $(eval $(call gb_UnpackedTarball_add_patches,mariadb-connector-c,\
     external/mariadb-connector-c/clang-cl.patch.0 \
+    external/mariadb-connector-c/c23.patch.0 \
 ))
 
 # TODO are any "plugins" needed?
diff --git a/external/mariadb-connector-c/c23.patch.0 b/external/mariadb-connector-c/c23.patch.0
new file mode 100644
index 000000000000..d19d6be4cdae
--- /dev/null
+++ b/external/mariadb-connector-c/c23.patch.0
@@ -0,0 +1,11 @@
+--- include/ma_global.h
++++ include/ma_global.h
+@@ -683,7 +683,7 @@
+ typedef int		myf;	/* Type of MyFlags in my_funcs */
+ typedef char		my_bool; /* Small bool */
+ typedef unsigned long long my_ulonglong;
+-#if !defined(bool) && !defined(bool_defined) && (!defined(HAVE_BOOL) || !defined(__cplusplus))
++#if !defined(bool) && !defined(bool_defined) && !(defined(__cplusplus) || __STDC_VERSION__ >= 202311L)
+ typedef char		bool;	/* Ordinary boolean values 0 1 */
+ #endif
+ 	/* Macros for converting *constants* to the right type */