diff --git a/sys-auth/passwdqc/passwdqc-1.4.0.ebuild b/sys-auth/passwdqc/passwdqc-1.4.0.ebuild
index 0449d6d07cb96..5460ff583ae40 100644
--- a/sys-auth/passwdqc/passwdqc-1.4.0.ebuild
+++ b/sys-auth/passwdqc/passwdqc-1.4.0.ebuild
@@ -27,7 +27,7 @@ src_prepare() {
 }
 
 _emake() {
-	emake \
+	emake -j1 \
 		SHARED_LIBDIR="/usr/$(get_libdir)" \
 		SECUREDIR="$(getpam_mod_dir)" \
 		CFLAGS="${CFLAGS} ${CPPFLAGS}" \