diff --git a/packages/PLStream/pl-file.c b/packages/PLStream/pl-file.c
index 7abd46f8a..7ed5975be 100644
--- a/packages/PLStream/pl-file.c
+++ b/packages/PLStream/pl-file.c
@@ -481,7 +481,7 @@ PL_unify_stream_or_alias(term_t t, IOSTREAM *s)
 }
 
 
- int
+int
 PL_unify_stream(term_t t, IOSTREAM *s)
 { GET_LD
   stream_context *ctx;
@@ -503,7 +503,7 @@ PL_unify_stream(term_t t, IOSTREAM *s)
 }
 
 
- bool					/* old FLI name (compatibility) */
+bool					/* old FLI name (compatibility) */
 PL_open_stream(term_t handle, IOSTREAM *s)
 { return PL_unify_stream(handle, s);
 }
diff --git a/packages/PLStream/pl-incl.h b/packages/PLStream/pl-incl.h
index dd870849c..461e0db12 100644
--- a/packages/PLStream/pl-incl.h
+++ b/packages/PLStream/pl-incl.h
@@ -481,9 +481,13 @@ word pl_noprotocol(void);
 
 IOSTREAM *PL_current_input(void);
 IOSTREAM *PL_current_output(void);
-extern int PL_unify_stream_or_alias(term_t t, IOSTREAM *s);
-extern bool PL_open_stream(term_t handle, IOSTREAM *s);
-extern void PL_write_prompt(int dowrite);
+
+PL_EXPORT(int)  	PL_open_stream(term_t t, IOSTREAM *s);
+PL_EXPORT(int)  	PL_unify_stream(term_t t, IOSTREAM *s);
+PL_EXPORT(int)  	PL_unify_stream_or_alias(term_t t, IOSTREAM *s);
+PL_EXPORT(int)  	PL_get_stream_handle(term_t t, IOSTREAM **s);
+PL_EXPORT(void)  	PL_write_prompt(int);
+PL_EXPORT(int) 		PL_release_stream(IOSTREAM *s);
 
 /**** stuff from pl-error.c ****/
 extern void		outOfCore(void);