diff --git a/games-emulation/melonds/melonds-1.0.ebuild b/games-emulation/melonds/melonds-1.0.ebuild
index 70eb307c79f64..38d25d364487d 100644
--- a/games-emulation/melonds/melonds-1.0.ebuild
+++ b/games-emulation/melonds/melonds-1.0.ebuild
@@ -7,7 +7,7 @@ REAL_PN="melonDS"
 REAL_PV="${PV/_rc/rc}"
 REAL_P="${REAL_PN}-${REAL_PV}"
 
-inherit cmake readme.gentoo-r1 toolchain-funcs xdg
+inherit cmake flag-o-matic readme.gentoo-r1 toolchain-funcs xdg
 
 DESCRIPTION="Nintendo DS emulator, sorta"
 HOMEPAGE="http://melonds.kuribo64.net
@@ -65,6 +65,12 @@ Place them in ~/.config/melonDS
 Those files can be extracted from devices or found somewhere on the Internet ;-)"
 
 src_configure() {
+	# -Werror=strict-aliasing
+	# https://bugs.gentoo.org/959632
+	# https://github.com/melonDS-emu/melonDS/issues/2349
+	append-flags -fno-strict-aliasing
+	filter-lto
+
 	local -a mycmakeargs=(
 		-DUSE_CCACHE="OFF"
 
diff --git a/games-emulation/melonds/melonds-1.0_rc.ebuild b/games-emulation/melonds/melonds-1.0_rc.ebuild
index 582290394b829..ef8370e74f5b6 100644
--- a/games-emulation/melonds/melonds-1.0_rc.ebuild
+++ b/games-emulation/melonds/melonds-1.0_rc.ebuild
@@ -7,7 +7,7 @@ REAL_PN="melonDS"
 REAL_PV="${PV/_rc/rc}"
 REAL_P="${REAL_PN}-${REAL_PV}"
 
-inherit cmake readme.gentoo-r1 toolchain-funcs xdg
+inherit cmake flag-o-matic readme.gentoo-r1 toolchain-funcs xdg
 
 DESCRIPTION="Nintendo DS emulator, sorta"
 HOMEPAGE="http://melonds.kuribo64.net
@@ -65,6 +65,12 @@ Place them in ~/.config/melonDS
 Those files can be extracted from devices or found somewhere on the Internet ;-)"
 
 src_configure() {
+	# -Werror=strict-aliasing
+	# https://bugs.gentoo.org/959632
+	# https://github.com/melonDS-emu/melonDS/issues/2349
+	append-flags -fno-strict-aliasing
+	filter-lto
+
 	local -a mycmakeargs=(
 		-DUSE_CCACHE="OFF"
 
diff --git a/games-emulation/melonds/melonds-9999.ebuild b/games-emulation/melonds/melonds-9999.ebuild
index 70eb307c79f64..38d25d364487d 100644
--- a/games-emulation/melonds/melonds-9999.ebuild
+++ b/games-emulation/melonds/melonds-9999.ebuild
@@ -7,7 +7,7 @@ REAL_PN="melonDS"
 REAL_PV="${PV/_rc/rc}"
 REAL_P="${REAL_PN}-${REAL_PV}"
 
-inherit cmake readme.gentoo-r1 toolchain-funcs xdg
+inherit cmake flag-o-matic readme.gentoo-r1 toolchain-funcs xdg
 
 DESCRIPTION="Nintendo DS emulator, sorta"
 HOMEPAGE="http://melonds.kuribo64.net
@@ -65,6 +65,12 @@ Place them in ~/.config/melonDS
 Those files can be extracted from devices or found somewhere on the Internet ;-)"
 
 src_configure() {
+	# -Werror=strict-aliasing
+	# https://bugs.gentoo.org/959632
+	# https://github.com/melonDS-emu/melonDS/issues/2349
+	append-flags -fno-strict-aliasing
+	filter-lto
+
 	local -a mycmakeargs=(
 		-DUSE_CCACHE="OFF"