diff --git a/Makefile.am b/Makefile.am
index 01e94fa8..68e8642e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -96,6 +96,7 @@ vkd3d_shader_tests = \
 	tests/hlsl/effect-technique-fx_2.shader_test \
 	tests/hlsl/effect-technique-fx_4.shader_test \
 	tests/hlsl/effect-technique-fx_5.shader_test \
+	tests/hlsl/effect-variables-fx_2.shader_test \
 	tests/hlsl/entry-point-semantics.shader_test \
 	tests/hlsl/exp.shader_test \
 	tests/hlsl/expr-indexing.shader_test \
diff --git a/libs/vkd3d-shader/fx.c b/libs/vkd3d-shader/fx.c
index ce47867b..0bc5a8c3 100644
--- a/libs/vkd3d-shader/fx.c
+++ b/libs/vkd3d-shader/fx.c
@@ -643,6 +643,7 @@ static uint32_t write_fx_2_parameter(const struct hlsl_type *type, const char *n
 
     switch (type->base_type)
     {
+        case HLSL_TYPE_HALF:
         case HLSL_TYPE_FLOAT:
         case HLSL_TYPE_BOOL:
         case HLSL_TYPE_INT:
diff --git a/tests/hlsl/effect-variables-fx_2.shader_test b/tests/hlsl/effect-variables-fx_2.shader_test
new file mode 100644
index 00000000..ab992253
--- /dev/null
+++ b/tests/hlsl/effect-variables-fx_2.shader_test
@@ -0,0 +1,11 @@
+[require]
+shader model < 3.0
+
+[effect]
+bool _bool;
+float _float;
+half _half;
+
+technique
+{
+}