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-rw-r--r--src/internal/intscan.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/internal/intscan.c b/src/internal/intscan.c
index 65d497ec..a4a5ae86 100644
--- a/src/internal/intscan.c
+++ b/src/internal/intscan.c
@@ -29,7 +29,7 @@ unsigned long long __intscan(FILE *f, unsigned base, int pok, unsigned long long
int c, neg=0;
unsigned x;
unsigned long long y;
- if (base > 36) {
+ if (base > 36 || base == 1) {
errno = EINVAL;
return 0;
}