diff --git a/include/fc/interprocess/iprocess.hpp b/include/fc/interprocess/iprocess.hpp
index 3dcbfed..0f8671e 100644
--- a/include/fc/interprocess/iprocess.hpp
+++ b/include/fc/interprocess/iprocess.hpp
@@ -31,13 +31,13 @@ namespace fc
            *  
            *  @return *this
            */
-          virtual iprocess& exec( const fc::path& exe, std::vector<std::string> args, 
-                             const fc::path& work_dir = fc::path(), exec_opts opts = open_all ) = 0;
+          virtual iprocess& exec( const path& exe, std::vector<std::string> args, 
+                                  const path& work_dir = path(), exec_opts opts = open_all ) = 0;
 
           /**
            *  @return blocks until the process exits
            */
-          virtual int result() = 0;
+          virtual int result(const microseconds& timeout = microseconds::maximum()) = 0;
 
 
           /**
@@ -48,16 +48,16 @@ namespace fc
           /**
            *  @brief returns a stream that writes to the process' stdin
            */
-          virtual fc::buffered_ostream_ptr in_stream() = 0;
+          virtual buffered_ostream_ptr in_stream() = 0;
           
           /**
            *  @brief returns a stream that reads from the process' stdout
            */
-          virtual fc::buffered_istream_ptr out_stream() = 0;
+          virtual buffered_istream_ptr out_stream() = 0;
           /**
            *  @brief returns a stream that reads from the process' stderr
            */
-          virtual fc::buffered_istream_ptr err_stream() = 0;
+          virtual buffered_istream_ptr err_stream() = 0;
 
     };
 
diff --git a/include/fc/interprocess/process.hpp b/include/fc/interprocess/process.hpp
index eb13a4a..28333ef 100644
--- a/include/fc/interprocess/process.hpp
+++ b/include/fc/interprocess/process.hpp
@@ -20,7 +20,8 @@ namespace fc {
                               const fc::path&  work_dir = fc::path(), 
                               exec_opts        opts     = open_all    );
 
-      virtual int                        result();
+      
+      virtual int                        result(const microseconds& timeout = microseconds::maximum());
       virtual void                       kill();
       virtual fc::buffered_ostream_ptr   in_stream();
       virtual fc::buffered_istream_ptr   out_stream();
diff --git a/src/interprocess/process.cpp b/src/interprocess/process.cpp
index 5cb46d6..5504138 100644
--- a/src/interprocess/process.cpp
+++ b/src/interprocess/process.cpp
@@ -179,9 +179,9 @@ fc::buffered_istream_ptr process::err_stream() {
   return my->_err;
 }
 
-int process::result() 
+int process::result(const microseconds& timeout /* = microseconds::maximum() */) 
 {
-    return my->_exited.wait();
+    return my->_exited.wait(timeout);
 }
 
 }