diff --git a/src/matrix.cpp b/src/matrix.cpp
index 4728a98..c48aae3 100644
--- a/src/matrix.cpp
+++ b/src/matrix.cpp
@@ -445,7 +445,7 @@ namespace matrix{
 			res = rjp_search_member(res.value, "events", 0);
 			if(!res.value) continue;
 			for(RJP_value* event = rjp_get_element(res.value);event;event = rjp_next_element(event)){
-				static const char* search_terms[] = {"event_id", "sender", "state_key", "unsigned"};
+				static constexpr const char* search_terms[] = {"event_id", "sender", "state_key", "unsigned"};
 				static constexpr size_t num_searches = sizeof(search_terms)/sizeof(search_terms[0]);
 				RJP_search_res results[num_searches] = {};
 				rjp_search_members(event, num_searches, search_terms, results, 0);
@@ -465,7 +465,7 @@ namespace matrix{
 			res = rjp_search_member(res.value, "events", 0);
 			if(!res.value) continue;
 			for(RJP_value* event = rjp_get_element(res.value);event;event = rjp_next_element(event)){
-				static const char* searches[] = {"sender", "content", "event_id", "unsigned"};
+				static constexpr const char* searches[] = {"sender", "content", "event_id", "unsigned"};
 				static constexpr size_t num_searches = sizeof(searches)/sizeof(searches[0]);
 				RJP_search_res results[num_searches] = {};
 				rjp_search_members(event, num_searches, searches, results, 0);