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-rw-r--r--src/os_win32.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/os_win32.h b/src/os_win32.h
index 15e616061..b57ee2388 100644
--- a/src/os_win32.h
+++ b/src/os_win32.h
@@ -28,6 +28,9 @@
#ifndef HAVE_STRING_H
# define HAVE_STRING_H
#endif
+#ifndef HAVE_MATH_H
+# define HAVE_MATH_H
+#endif
#define HAVE_STRCSPN
#ifndef __GNUC__
#define HAVE_STRICMP