diff --git a/multimedia/ltc-tools/Portfile b/multimedia/ltc-tools/Portfile
index 31dac24c31b..380b8d23513 100644
--- a/multimedia/ltc-tools/Portfile
+++ b/multimedia/ltc-tools/Portfile
@@ -11,7 +11,6 @@ checksums           rmd160  5ceef021657f6d6bcf64a3c209200539c25a613b \
                     size    40292
 
 categories          multimedia
-platforms           darwin
 maintainers         {ryandesign @ryandesign} openmaintainer
 license             GPL-2+
 
@@ -22,8 +21,12 @@ long_description    ltc-tools provides command line programs for reading \
 
 github.tarball_from releases
 
-depends_build       port:pkgconfig
+depends_build       path:bin/pkg-config:pkgconfig
 
 depends_lib         port:jack \
                     port:libltc \
                     port:libsndfile
+
+# common_ltcgen.c:200: error: ‘for’ loop initial declaration used outside C99 mode
+configure.cflags-append \
+                    -std=c99