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-rw-r--r--test/math/signgam.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/math/signgam.c b/test/math/signgam.c
index d79d6afb2..2f1adbaad 100644
--- a/test/math/signgam.c
+++ b/test/math/signgam.c
@@ -1,5 +1,6 @@
#define _XOPEN_SOURCE 600
#include <math.h>
+#include <float.h>
#include <stdio.h>
double zero = 0.0;