diff --git a/dlls/d3dx9_36/effect.c b/dlls/d3dx9_36/effect.c
index a4bce690fbf..4b6321b659a 100644
--- a/dlls/d3dx9_36/effect.c
+++ b/dlls/d3dx9_36/effect.c
@@ -581,6 +581,9 @@ static void free_parameter(struct d3dx_parameter *param, BOOL element, BOOL chil
         HeapFree(GetProcessHeap(), 0, param->members);
     }
 
+    if (param->full_name)
+        heap_free(param->full_name);
+
     free_parameter_data(param, child);
 
     /* only the parent has to release name and semantic */