diff --git a/extra/openmpi/PKGBUILD b/extra/openmpi/PKGBUILD
index 1bed8668f..ba8e9bea0 100644
--- a/extra/openmpi/PKGBUILD
+++ b/extra/openmpi/PKGBUILD
@@ -5,6 +5,7 @@
 # ALARM: Kevin Mihelich <kevin@archlinuxarm.org
 #  - only use valgrind with v7/v8
 #  - remove make/optdepend on cude and configure option
+#  - explicitly link v5 with libatomic
 
 pkgname=openmpi
 pkgver=4.1.1
@@ -28,6 +29,7 @@ build() {
 
    # enable valgrind and memchecker for v7/v8
    [[ $CARCH == "armv7h" || $CARCH == "aarch64" ]] && CONFIG='--with-valgrind --enable-memchecker'
+   [[ $CARCH == "arm" ]] && LDFLAGS+=" -Wl,--no-as-needed -latomic -Wl,--as-needed"
 
   ./configure \
     --prefix=/usr \