diff --git a/src/plugins/mpi/lam/Makefile.am b/src/plugins/mpi/lam/Makefile.am
index c83de353365f15bc1a92cba7ed1a9bd45823e401..b34a0a559ad6fef5aaa26f41261ddc6aa837dc7d 100644
--- a/src/plugins/mpi/lam/Makefile.am
+++ b/src/plugins/mpi/lam/Makefile.am
@@ -9,8 +9,7 @@ INCLUDES = -I$(top_srcdir) -I$(top_srcdir)/src/common
 
 pkglib_LTLIBRARIES = mpi_lam.la
 
-# Null switch plugin.
-mpi_lam_la_SOURCES = mpi_lam.c
+mpi_lam_la_SOURCES = mpi_lam.c lam.h
 mpi_lam_la_LDFLAGS = $(SO_LDFLAGS) $(PLUGIN_FLAGS)
 mpi_lam_la_LIBADD  =  \
 	$(top_builddir)/src/common/libcommon.la -lpthread \