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-rw-r--r--src/config.h.in1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/config.h.in b/src/config.h.in
index 364cdc8..de1a4dd 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -38,6 +38,7 @@ extern "C" {
#if defined(_MSC_VER) && _MSC_VER < 1900
#include <stdio.h>
+#include <stdarg.h>
#define snprintf c99_snprintf
#define vsnprintf c99_vsnprintf