diff --git a/src/exman.cpp b/src/exman.cpp
index eeb9be8f3..d8c202f7f 100644
--- a/src/exman.cpp
+++ b/src/exman.cpp
@@ -1521,7 +1521,7 @@ RC rerIV( 	// inner fcn to issue runtime error message; msg handle ok for fmt; t
 	// era here controls reporting of errors in msgI only.
 // assemble complete text
 	char whole[920];
-	_snprintf( whole, sizeof( whole)-1, "%s:\n  %s", when, cmsg );
+	snprintf( whole, sizeof( whole)-1, "%s:\n  %s", when, cmsg );
 
 // output message to err file and/or screen, increment error count.
 	return errI( 			// central message issuer, rmkerr.cpp. returns RCBAD for convenience.