diff --git a/include/openmc/capi.h b/include/openmc/capi.h
index aad72a1386..d3895ced7d 100644
--- a/include/openmc/capi.h
+++ b/include/openmc/capi.h
@@ -7,6 +7,9 @@
 
 #ifdef __cplusplus
 #include "openmc/bank.h"
+
+extern "C" const bool dagmc_enabled;
+
 extern "C" {
   int openmc_fission_bank(openmc::Bank** ptr, int64_t* n);
   int openmc_source_bank(openmc::Bank** ptr, int64_t* n);
diff --git a/include/openmc/settings.h b/include/openmc/settings.h
index 8781413b07..e95bcb107a 100644
--- a/include/openmc/settings.h
+++ b/include/openmc/settings.h
@@ -20,8 +20,6 @@ namespace openmc {
 // Global variable declarations
 //==============================================================================
 
-extern "C" const bool dagmc_enabled;
-
 namespace settings {
 
 // Boolean flags