diff --git a/main/pbx.c b/main/pbx.c
index dd6e66fdbf..031db87607 100644
--- a/main/pbx.c
+++ b/main/pbx.c
@@ -5191,6 +5191,11 @@ enum ast_pbx_result ast_pbx_start(struct ast_channel *c)
 		return AST_PBX_FAILED;
 	}
 
+	if (!ast_test_flag(&ast_options, AST_OPT_FLAG_FULLY_BOOTED)) {
+		ast_log(LOG_WARNING, "PBX requires Asterisk to be fully booted\n");
+		return AST_PBX_FAILED;
+	}
+
 	if (increase_call_count(c))
 		return AST_PBX_CALL_LIMIT;
 
@@ -5208,6 +5213,11 @@ enum ast_pbx_result ast_pbx_run_args(struct ast_channel *c, struct ast_pbx_args
 {
 	enum ast_pbx_result res = AST_PBX_SUCCESS;
 
+	if (!ast_test_flag(&ast_options, AST_OPT_FLAG_FULLY_BOOTED)) {
+		ast_log(LOG_WARNING, "PBX requires Asterisk to be fully booted\n");
+		return AST_PBX_FAILED;
+	}
+
 	if (increase_call_count(c)) {
 		return AST_PBX_CALL_LIMIT;
 	}