diff --git a/app-forensics/aflplusplus/aflplusplus-3.12c.recipe b/app-forensics/aflplusplus/aflplusplus-3.12c.recipe
index 7b7914799..780c75349 100644
--- a/app-forensics/aflplusplus/aflplusplus-3.12c.recipe
+++ b/app-forensics/aflplusplus/aflplusplus-3.12c.recipe
@@ -74,7 +74,7 @@ TEST_REQUIRES="
 PATCH()
 {
 	# grabbed from Gentoo port
-	sed -i -e 's/-O3 -fno-unroll-loops//' GNUmakefile
+	sed -i -e 's/-O3 -fno-unroll-loops//' -e 's/-j/-j1/g' GNUmakefile
 }
 
 makeAfl()