diff --git a/C/iopreds.c b/C/iopreds.c
index 3b512ab1d..244782998 100644
--- a/C/iopreds.c
+++ b/C/iopreds.c
@@ -88,7 +88,7 @@ int  in_getc = FALSE;
 FILE *rl_instream, *rl_outstream;
 #endif
 
-jmp_buf readline_jmpbuf;
+sigjmp_buf readline_jmpbuf;
 
 #endif