diff --git a/src/spirv/spirv_module.cpp b/src/spirv/spirv_module.cpp
index 4631fe754..48179271b 100644
--- a/src/spirv/spirv_module.cpp
+++ b/src/spirv/spirv_module.cpp
@@ -296,6 +296,22 @@ namespace dxvk {
     return this->constComposite(vectorTypeId, args.size(), args.data());
   }
   
+
+  uint32_t SpirvModule::constvec3f32(
+          float                   x,
+          float                   y,
+          float                   z) {
+    std::array<uint32_t, 3> args = {{
+      this->constf32(x), this->constf32(y),
+      this->constf32(z),
+    }};
+    
+    uint32_t scalarTypeId = this->defFloatType(32);
+    uint32_t vectorTypeId = this->defVectorType(scalarTypeId, 3);
+    
+    return this->constComposite(vectorTypeId, args.size(), args.data());
+  }
+
   
   uint32_t SpirvModule::constvec4f32(
           float                   x,
diff --git a/src/spirv/spirv_module.h b/src/spirv/spirv_module.h
index 13c2a49a0..a72a772e7 100644
--- a/src/spirv/spirv_module.h
+++ b/src/spirv/spirv_module.h
@@ -143,7 +143,12 @@ namespace dxvk {
             uint32_t                y,
             uint32_t                z,
             uint32_t                w);
-    
+
+    uint32_t constvec3f32(
+            float                   x,
+            float                   y,
+            float                   z);
+
     uint32_t constvec4f32(
             float                   x,
             float                   y,