diff --git a/include/openmc.h b/include/openmc.h
index ce28fa2d0..a9ffa74d7 100644
--- a/include/openmc.h
+++ b/include/openmc.h
@@ -32,7 +32,7 @@ extern "C" {
   int openmc_extend_sources(int32_t n, int32_t* index_start, int32_t* index_end);
   int openmc_extend_tallies(int32_t n, int32_t* index_start, int32_t* index_end);
   int openmc_filter_get_id(int32_t index, int32_t* id);
-  int openmc_filter_get_type(int32_t index, const char** type);
+  int openmc_filter_get_type(int32_t index, const char* type);
   int openmc_filter_set_id(int32_t index, int32_t id);
   int openmc_filter_set_type(int32_t index, const char* type);
   int openmc_finalize();