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-rw-r--r--examples/c/lexcalc/scan.l1
1 files changed, 1 insertions, 0 deletions
diff --git a/examples/c/lexcalc/scan.l b/examples/c/lexcalc/scan.l
index fc73f3b0..815f7782 100644
--- a/examples/c/lexcalc/scan.l
+++ b/examples/c/lexcalc/scan.l
@@ -4,6 +4,7 @@
%option nodefault noinput nounput noyywrap
%{
+#include <errno.h> /* errno, ERANGE */
#include <limits.h> /* INT_MIN */
#include <stdlib.h> /* strtol */