diff --git a/README.md b/README.md
index 72924e5..ddbecde 100644
--- a/README.md
+++ b/README.md
@@ -388,6 +388,7 @@ http://rubydoc.info/github/holtrop/rscons/frames.
 - fix Rscons.set_suffix to append the given suffix if the filename has none
 - rework Preprocess builder to consider deep dependencies
 - remove ${CFLAGS} from default CPP_CMD
+- fix variable references that expand to arrays in build target sources
 
 ### v1.8.1
 
diff --git a/lib/rscons/environment.rb b/lib/rscons/environment.rb
index 808393e..a230c9e 100644
--- a/lib/rscons/environment.rb
+++ b/lib/rscons/environment.rb
@@ -683,7 +683,7 @@ module Rscons
         sources = target_params[:sources].map do |source|
           source = expand_path(source) if @build_root
           expand_varref(source)
-        end
+        end.flatten
         target = expand_path(target) if @build_root
         target = expand_varref(target)
         result[target] = target_params.merge(sources: sources)
diff --git a/spec/build_tests_spec.rb b/spec/build_tests_spec.rb
index 6fb7ee1..63e6598 100644
--- a/spec/build_tests_spec.rb
+++ b/spec/build_tests_spec.rb
@@ -754,4 +754,14 @@ EOF
     expect(File.read("pp")).to match(%r{abc88xyz}m)
   end
 
+  it "allows construction variable references which expand to arrays in sources of a build target" do
+    test_dir("simple")
+    Rscons::Environment.new do |env|
+      env["sources"] = Dir["*.c"]
+      env.Program("simple", "${sources}")
+    end
+    expect(File.exists?("simple.o")).to be_truthy
+    expect(`./simple`).to eq "This is a simple C program\n"
+  end
+
 end