diff --git a/dlls/advapi32/service.c b/dlls/advapi32/service.c
index f69e78f2943..49d56d11cd1 100644
--- a/dlls/advapi32/service.c
+++ b/dlls/advapi32/service.c
@@ -402,11 +402,13 @@ static DWORD WINAPI service_control_dispatcher(LPVOID arg)
             {
                 if (GetLastError() != ERROR_BROKEN_PIPE)
                     ERR( "pipe read failed error %u\n", GetLastError() );
+                HeapFree( GetProcessHeap(), 0, data );
                 break;
             }
             if (count != data_size)
             {
                 ERR( "partial pipe read %u/%u\n", count, data_size );
+                HeapFree( GetProcessHeap(), 0, data );
                 break;
             }
         }