3 files changed, 13 insertions, 6 deletions
diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index 7a05c7e5b85..dcb7a1a3209 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -606,9 +606,6 @@
 /* Define to 1 if you have the external array `tzname'. */
 #undef HAVE_TZNAME
 
-/* Define to 1 if you have the `ucol_strcollUTF8' function. */
-#undef HAVE_UCOL_STRCOLLUTF8
-
 /* Define to 1 if you have the <ucred.h> header file. */
 #undef HAVE_UCRED_H
 
diff --git a/src/include/pg_config.h.win32 b/src/include/pg_config.h.win32
index 9d3021ced88..7f60670fa6f 100644
--- a/src/include/pg_config.h.win32
+++ b/src/include/pg_config.h.win32
@@ -457,9 +457,6 @@
 /* Define to 1 if you have the external array `tzname'. */
 /* #undef HAVE_TZNAME */
 
-/* Define to 1 if you have the `ucol_strcollUTF8' function. */
-#define HAVE_UCOL_STRCOLLUTF8 1
-
 /* Define to 1 if the system has the type `uint64'. */
 /* #undef HAVE_UINT64 */
 
diff --git a/src/include/utils/pg_locale.h b/src/include/utils/pg_locale.h
index a02d27ba266..f3e04d4d8ce 100644
--- a/src/include/utils/pg_locale.h
+++ b/src/include/utils/pg_locale.h
@@ -21,6 +21,19 @@
 
 #include "utils/guc.h"
 
+#ifdef USE_ICU
+/*
+ * ucol_strcollUTF8() was introduced in ICU 50, but it is buggy before ICU 53.
+ * (see
+ * <https://www.postgresql.org/message-id/flat/f1438ec6-22aa-4029-9a3b-26f79d330e72%40manitou-mail.org>)
+ */
+#if U_ICU_VERSION_MAJOR_NUM >= 53
+#define HAVE_UCOL_STRCOLLUTF8 1
+#else
+#undef HAVE_UCOL_STRCOLLUTF8
+#endif
+#endif
+
 
 /* GUC settings */
 extern char *locale_messages;