diff --git a/dlls/usp10/usp10.c b/dlls/usp10/usp10.c
index ea5339bf0f1..feedc5b89cb 100644
--- a/dlls/usp10/usp10.c
+++ b/dlls/usp10/usp10.c
@@ -595,8 +595,39 @@ HRESULT WINAPI ScriptStringXtoCP(SCRIPT_STRING_ANALYSIS ssa, int iX, int* piCh,
  *      ScriptStringFree (USP10.@)
  *
  */
-HRESULT WINAPI ScriptStringFree(SCRIPT_STRING_ANALYSIS *pssa) {
-    FIXME("(%p): stub\n",pssa);
+HRESULT WINAPI ScriptStringFree(SCRIPT_STRING_ANALYSIS *pssa)
+{
+    StringAnalysis* analysis;
+    BOOL invalid;
+    int i;
+    TRACE("(%p)\n",pssa);
+
+    if(!pssa)
+        return E_INVALIDARG;
+
+    analysis = *pssa;
+    if(!analysis)
+        return E_INVALIDARG;
+
+    invalid = analysis->invalid;
+
+    for(i=0; i<analysis->numItems; i++)
+    {
+        HeapFree(GetProcessHeap(), 0, analysis->glyphs[i].glyphs);
+        HeapFree(GetProcessHeap(), 0, analysis->glyphs[i].pwLogClust);
+        HeapFree(GetProcessHeap(), 0, analysis->glyphs[i].piAdvance);
+        HeapFree(GetProcessHeap(), 0, analysis->glyphs[i].psva);
+        HeapFree(GetProcessHeap(), 0, analysis->glyphs[i].pGoffset);
+        HeapFree(GetProcessHeap(), 0, analysis->glyphs[i].abc);
+    }
+
+    HeapFree(GetProcessHeap(), 0, analysis->glyphs);
+    HeapFree(GetProcessHeap(), 0, analysis->pItem);
+    HeapFree(GetProcessHeap(), 0, analysis);
+
+    if(invalid)
+        return E_INVALIDARG;
+
     return S_OK;
 }