diff --git a/src/crt_launch/SConscript b/src/crt_launch/SConscript
index 677a5f6d0..60ab0189e 100644
--- a/src/crt_launch/SConscript
+++ b/src/crt_launch/SConscript
@@ -50,7 +50,7 @@ def scons():
 
     tenv.AppendUnique(CPPPATH=['#/src/cart'])
     tenv.AppendUnique(LIBS=['cart', 'gurt', 'pthread', 'm', 'mpi'])
-    prereqs.require(tenv, 'mercury')
+    prereqs.require(tenv, 'mercury', 'ompi')
     tenv.AppendUnique(LIBPATH=['#/src/cart'])
     tenv.AppendUnique(RPATH="$PREFIX/lib")
     tenv.AppendUnique(FLAGS='-pthread')