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-rw-r--r--missing/isinf.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/missing/isinf.c b/missing/isinf.c
index 0297efdfd4..992ca57f67 100644
--- a/missing/isinf.c
+++ b/missing/isinf.c
@@ -1,3 +1,9 @@
+#ifdef HAVE_STRING_H
+# include <string.h>
+#else
+# include <strings.h>
+#endif
+
static double zero() { return 0.0; }
static double one() { return 1.0; }
static double inf() { return one() / zero(); }