diff --git a/devel/libvterm/Portfile b/devel/libvterm/Portfile
index 4381c3b720df..0e205d33dad1 100644
--- a/devel/libvterm/Portfile
+++ b/devel/libvterm/Portfile
@@ -29,10 +29,13 @@ checksums           rmd160  757be59cf6b79f92bd8f45c95eb47276c04b4394 \
 compiler.c_standard 1999
 
 depends_build       port:libtool \
-                    port:pkgconfig
+                    path:bin/pkg-config:pkgconfig
 
 patchfiles-append   patch-disable-silent-rules.diff
 
+# cc1: error: unrecognized command line option "-Wpedantic"
+patchfiles-append   patch-fix-pedantic.diff
+
 use_configure no
 
 build.args          PREFIX=${prefix}
diff --git a/devel/libvterm/files/patch-fix-pedantic.diff b/devel/libvterm/files/patch-fix-pedantic.diff
new file mode 100644
index 000000000000..2f73389888d4
--- /dev/null
+++ b/devel/libvterm/files/patch-fix-pedantic.diff
@@ -0,0 +1,11 @@
+--- Makefile
++++ Makefile	2024-07-17 04:36:00.000000000 +0800
+@@ -8,7 +8,7 @@
+   LIBTOOL +=--quiet
+ endif
+ 
+-override CFLAGS +=-Wall -Iinclude -std=c99 -Wpedantic
++override CFLAGS +=-Wall -Iinclude -std=c99 -pedantic
+ 
+ ifeq ($(shell uname),SunOS)
+   override CFLAGS +=-D__EXTENSIONS__ -D_XPG6 -D__XOPEN_OR_POSIX