diff --git a/packages/irssi/build.sh b/packages/irssi/build.sh
index 23ebda4b5..16b6165f1 100644
--- a/packages/irssi/build.sh
+++ b/packages/irssi/build.sh
@@ -27,7 +27,7 @@ termux_step_pre_configure() {
 	sed -e "s|@TERMUX_PREFIX@|$TERMUX_PREFIX|g" \
 		-e "s|@TERMUX_PERL_VERSION@|$perl_version|g" \
 		-e "s|@TERMUX_PERL_TARGET@|${TERMUX_ARCH}-android|g" \
-		$TERMUX_PKG_BUILDER_DIR/perl_config_support.patch.txt | \
+		$TERMUX_PKG_BUILDER_DIR/perl_config_support.diff | \
 		patch -p1
 	autoconf
 	TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" --with-perl-lib=$TERMUX_PREFIX/lib/perl5/site_perl/$perl_version/${TERMUX_ARCH}-android"
diff --git a/packages/irssi/perl_config_support.patch.txt b/packages/irssi/perl_config_support.diff
similarity index 100%
rename from packages/irssi/perl_config_support.patch.txt
rename to packages/irssi/perl_config_support.diff