diff --git a/dev-libs/mpfr/mpfr-4.2.1.ebuild b/dev-libs/mpfr/mpfr-4.2.1.ebuild
index 51785b6b1fda2..6b56ce06b1260 100644
--- a/dev-libs/mpfr/mpfr-4.2.1.ebuild
+++ b/dev-libs/mpfr/mpfr-4.2.1.ebuild
@@ -61,7 +61,7 @@ PATCHES=(
 	"${MY_PATCHES[@]}"
 
 	# Additional patches
-	${FILESDIR}/${PN}-4.2.1-include-math.h-to-use-predefined-_Float128-definitio.patch
+	"${FILESDIR}"/${PN}-4.2.1-include-math.h-to-use-predefined-_Float128-definitio.patch
 )
 
 HTML_DOCS=( doc/FAQ.html )