diff --git a/media-gfx/librecad/librecad-2.1.3.recipe b/media-gfx/librecad/librecad-2.1.3.recipe
index aecfd65c9..47b090b22 100644
--- a/media-gfx/librecad/librecad-2.1.3.recipe
+++ b/media-gfx/librecad/librecad-2.1.3.recipe
@@ -6,7 +6,7 @@ translations."
 HOMEPAGE="http://librecad.org/"
 COPYRIGHT="2017 LibreCAD"
 LICENSE="GNU GPL v2"
-REVISION="3"
+REVISION="4"
 SOURCE_URI="https://github.com/LibreCAD/LibreCAD/archive/$portVersion.tar.gz"
 CHECKSUM_SHA256="74c4ede409b13d0365c65c0cd52dba04f1049530f6df706dc905443d5e60db06"
 PATCHES="librecad-$portVersion.patchset"
@@ -24,6 +24,7 @@ REQUIRES="
 	haiku$secondaryArchSuffix
 	lib:libfreetype$secondaryArchSuffix
 	lib:libGL$secondaryArchSuffix
+	lib:libmuparser$secondaryArchSuffix
 	lib:libQt5Core$secondaryArchSuffix
 	lib:libQt5Gui$secondaryArchSuffix
 	lib:libQt5PrintSupport$secondaryArchSuffix
@@ -36,6 +37,7 @@ BUILD_REQUIRES="
 	devel:libboost_system$secondaryArchSuffix
 	devel:libfreetype$secondaryArchSuffix
 	devel:libGL$secondaryArchSuffix
+	devel:libmuparser$secondaryArchSuffix
 	devel:libQt5Core$secondaryArchSuffix
 	devel:libQt5Gui$secondaryArchSuffix
 	devel:libQt5PrintSupport$secondaryArchSuffix