Update IO rate display to use NAN on error

1 files changed, 1 insertions, 1 deletions

diff --git a/Process.c b/Process.c
index 428e121f..839db8d7 100644
--- a/Process.c
+++ b/Process.c
@@ -219,7 +219,7 @@ void Process_outputRate(RichString* str, char* buffer, int n, double rate, int c
       largeNumberColor = CRT_colors[PROCESS];
       processMegabytesColor = CRT_colors[PROCESS];
    }
-   if (rate == -1) {
+   if (isnan(rate)) {
       int len = snprintf(buffer, n, "    no perm ");
       RichString_appendn(str, CRT_colors[PROCESS_SHADOW], buffer, len);
    } else if (rate < ONE_K) {