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-rw-r--r--src/test/test-json.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/test/test-json.c b/src/test/test-json.c
index 8777cf7a40..00768358bf 100644
--- a/src/test/test-json.c
+++ b/src/test/test-json.c
@@ -19,6 +19,8 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <math.h>
+
#include "log.h"
#include "util.h"
#include "json.h"
@@ -52,7 +54,7 @@ static void test_one(const char *data, ...) {
double d;
d = va_arg(ap, double);
- assert_se(abs(d - v.real) < 0.001);
+ assert_se(fabs(d - v.real) < 0.001);
} else if (t == JSON_INTEGER) {
intmax_t i;