diff --git a/include/openmc.h b/include/openmc.h
index 11a39e1ff..d24ca4af9 100644
--- a/include/openmc.h
+++ b/include/openmc.h
@@ -16,7 +16,7 @@ extern "C" {
     int delayed_group;
   };
 
-  void openmc_calculate_voumes();
+  void openmc_calculate_volumes();
   int openmc_cell_get_fill(int32_t index, int* type, int32_t** indices, int32_t* n);
   int openmc_cell_get_id(int32_t index, int32_t* id);
   int openmc_cell_set_fill(int32_t index, int type, int32_t n, const int32_t* indices);