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-rw-r--r--common/util.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/common/util.c b/common/util.c
index 0caafb39..40c64230 100644
--- a/common/util.c
+++ b/common/util.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 700
+#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
@@ -24,7 +24,8 @@ int numlen(int n) {
if (n == 0) {
return 1;
}
- return log10(n) + 1;
+ // Account for the '-' in negative numbers.
+ return log10(abs(n)) + (n > 0 ? 1 : 2);
}
static struct modifier_key {