diff --git a/misc/sdformat/Makefile b/misc/sdformat/Makefile
index 038326573ff2..a67550627613 100644
--- a/misc/sdformat/Makefile
+++ b/misc/sdformat/Makefile
@@ -1,43 +1,41 @@
 PORTNAME=	sdformat
 DISTVERSION=	8.0.0
 PORTREVISION=	7
 CATEGORIES=	misc
 MASTER_SITES=	https://bitbucket.org/${BB_ACCOUNT}/${BB_PROJECT}/get/${BB_COMMIT}.tar.gz?dummy=/
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Simulation Description Format (SDF) parser and description files
 WWW=		https://bitbucket.org/osrf/sdformat/src/default/
 
 LICENSE=	APACHE20
 
-BROKEN=		tools/xmlschema.rb:268:in `<main>': undefined method `exists?' for File:Class (NoMethodError)
-
 BUILD_DEPENDS=	ignition-cmake==2:devel/ignition-cmake \
 		ignition-tools>0:devel/ignition-tools \
 		rubygem-rexml>0:textproc/rubygem-rexml
 LIB_DEPENDS=	libignition-math6.so:math/ignition-math \
 		libconsole_bridge.so:devel/ros-console_bridge \
 		libtinyxml2.so:textproc/tinyxml2 \
 		liburdfdom_world.so:devel/ros-urdfdom
 RUN_DEPENDS=	ignition-tools>0:devel/ignition-tools
 
 USES=		cmake compiler:c++17-lang pkgconfig ruby:build
 USE_LDCONFIG=	yes
 
 CMAKE_OFF=	BUILD_TESTING
 
 BB_ACCOUNT=	osrf
 BB_PROJECT=	${PORTNAME}
 BB_COMMIT=	f555f9a69f8f
 
 WRKSRC=		${WRKDIR}/${BB_ACCOUNT}-${BB_PROJECT}-${BB_COMMIT}
 
 PLIST_SUB+=	INCSUBDIR=${PORTNAME}-${DISTVERSION:R}
 
 do-test:
 	@cd ${BUILD_WRKSRC} && \
 		${SETENV} ${CONFIGURE_ENV} ${CMAKE_BIN} ${CMAKE_ARGS} -DBUILD_TESTING:BOOL=ON ${CMAKE_SOURCE_PATH} && \
 		${SETENV} ${MAKE_ENV} ${MAKE_CMD} ${MAKE_ARGS} ${ALL_TARGET} && \
 		${SETENV} ${MAKE_ENV} ${MAKE_CMD} ${MAKE_ARGS} test
 
 .include <bsd.port.mk>
diff --git a/misc/sdformat/files/patch-tools_xmlschema.rb b/misc/sdformat/files/patch-tools_xmlschema.rb
new file mode 100644
index 000000000000..86cd3de949ef
--- /dev/null
+++ b/misc/sdformat/files/patch-tools_xmlschema.rb
@@ -0,0 +1,31 @@
+- fix Ruby incompatibilities with File.exists? and Dir.exists?
+
+--- tools/xmlschema.rb.orig	2025-12-05 10:37:39.966228000 -0800
++++ tools/xmlschema.rb	2025-12-05 10:37:39.966839000 -0800
+@@ -265,7 +265,7 @@
+ if infile.nil?
+   puts "Missing option -i."
+   exit
+-elsif !File.exists?(infile)
++elsif !File.exist?(infile)
+   puts "Input file[#{infile}] does not exist\n"
+   exit
+ end
+@@ -273,7 +273,7 @@
+ if $path.nil?
+   puts "Missing option -s."
+   exit
+-elsif !Dir.exists?($path)
++elsif !Dir.exist?($path)
+   puts "SDF source dir[#{$path}] does not exist\n"
+   exit
+ end
+@@ -281,7 +281,7 @@
+ if outdir.nil?
+   puts "Missing output directory, option -o."
+   exit
+-elsif !Dir.exists?(outdir)
++elsif !Dir.exist?(outdir)
+   Dir.mkdir(outdir)
+ end
+