diff --git a/databases/postgresql-rum/Makefile b/databases/postgresql-rum/Makefile
index c40997abe2f3..9bc5e56ea958 100644
--- a/databases/postgresql-rum/Makefile
+++ b/databases/postgresql-rum/Makefile
@@ -1,26 +1,38 @@
 PORTNAME=	rum
-PORTVERSION=	1.3.14
+PORTVERSION=	1.3.15
 CATEGORIES=	databases
 PKGNAMEPREFIX=	postgresql${PGSQL_VER:S/.//}-
 
-MAINTAINER=	feld@FreeBSD.org
+MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Inverted index with additional information in posting lists
 WWW=		https://github.com/postgrespro/rum
 
 LICENSE=	PostgreSQL
 
 USES=		gmake pgsql:11+
 
 LLD_UNSAFE=	yes
 USE_GITHUB=	yes
 GH_ACCOUNT=	postgrespro
 
 WANT_PGSQL=	server
 
+# As of rum 1.3.15 and pg18 the build behaves differently.
+# The Makefile is including the PGXS Makefile framework
+# so the "installheaders" target never gets hit because
+# of USE_PGXS=1, but the Makefile doesn't work at all
+# without it as it wants to includes relative paths that
+# do not exist. The pgxs.mk supports installing headers
+# declared in HEADERS and now installs to an extension-specific
+# subdirectory. To ensure the headers are still available
+# we now declare them here.
+RUM_HEADERS=	src/rum.h src/rumsort.h
+
 do-build:
 	cd ${WRKSRC} && ${MAKE_CMD} USE_PGXS=1
 
 do-install:
-	cd ${WRKSRC} && ${MAKE_CMD} USE_PGXS=1 DESTDIR=${STAGEDIR} install
+	cd ${WRKSRC} && \
+	${MAKE_CMD} USE_PGXS=1 DESTDIR=${STAGEDIR} HEADERS="${RUM_HEADERS}" install
 
 .include <bsd.port.mk>
diff --git a/databases/postgresql-rum/distinfo b/databases/postgresql-rum/distinfo
index 301bce6a0303..40d01867225d 100644
--- a/databases/postgresql-rum/distinfo
+++ b/databases/postgresql-rum/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1743193862
-SHA256 (postgrespro-rum-1.3.14_GH0.tar.gz) = ca3412672beaf3dbf705521875ffa9a1ddb3fc6573449f8bd4557c577a3a6015
-SIZE (postgrespro-rum-1.3.14_GH0.tar.gz) = 567735
+TIMESTAMP = 1768439526
+SHA256 (postgrespro-rum-1.3.15_GH0.tar.gz) = e79b3a67df9821bc0d86fd463dac7249f1729d9dd04f77db767e2815098247b8
+SIZE (postgrespro-rum-1.3.15_GH0.tar.gz) = 558466
diff --git a/databases/postgresql-rum/pkg-plist b/databases/postgresql-rum/pkg-plist
index f72f9218daeb..7644fd60fa7c 100644
--- a/databases/postgresql-rum/pkg-plist
+++ b/databases/postgresql-rum/pkg-plist
@@ -1,9 +1,8 @@
-include/postgresql/server/rum.h
-include/postgresql/server/rumsort.h
+include/postgresql/server/extension/rum/rum.h
+include/postgresql/server/extension/rum/rumsort.h
 lib/postgresql/rum.so
 share/postgresql/extension/rum--1.0--1.1.sql
-share/postgresql/extension/rum--1.0.sql
 share/postgresql/extension/rum--1.1--1.2.sql
 share/postgresql/extension/rum--1.2--1.3.sql
 share/postgresql/extension/rum--1.3.sql
 share/postgresql/extension/rum.control