diff --git a/applications/gpac/gpac.c b/applications/gpac/gpac.c
index d1c8fa4ab1..20e60e2346 100644
--- a/applications/gpac/gpac.c
+++ b/applications/gpac/gpac.c
@@ -1920,7 +1920,7 @@ static GF_Err extract_filter_and_pid(char *arg, GF_Filter **o_f, s32 *opid_idx,
 		return GF_BAD_PARAM;
 	}
 
-	if ((*opid_idx>=0) && (*opid_idx>=count)) {
+	if ((*opid_idx>=0) && (*opid_idx>=(s32)count)) {
 		GF_LOG(GF_LOG_ERROR, GF_LOG_APP, ("No filter pid at index %d in filter %s in arg %s\n", *opid_idx, gf_filter_get_name(*o_f), arg ));
 		return GF_BAD_PARAM;
 	}
diff --git a/src/export.cpp b/src/export.cpp
index 179eb0cd43..fc8015ceee 100644
--- a/src/export.cpp
+++ b/src/export.cpp
@@ -2632,6 +2632,7 @@
 #pragma comment (linker, EXPORT_SYMBOL(gf_filter_pid_is_eos ) )
 #pragma comment (linker, EXPORT_SYMBOL(gf_filter_pid_set_eos ) )
 #pragma comment (linker, EXPORT_SYMBOL(gf_filter_pid_enum_properties ) )
+#pragma comment (linker, EXPORT_SYMBOL(gf_filter_pid_enum_info ) )
 #pragma comment (linker, EXPORT_SYMBOL(gf_filter_pid_would_block ) )
 #pragma comment (linker, EXPORT_SYMBOL(gf_filter_pid_is_sparse ) )
 #pragma comment (linker, EXPORT_SYMBOL(gf_filter_pid_query_buffer_duration ) )