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-rw-r--r--src/rotation_3d.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/rotation_3d.cpp b/src/rotation_3d.cpp
index db0ce5a..0795859 100644
--- a/src/rotation_3d.cpp
+++ b/src/rotation_3d.cpp
@@ -14,6 +14,8 @@
* limitations under the License.
*/
+#define _USE_MATH_DEFINES
+
#include "rotation_3d.hpp"
#include "vector_3d.hpp"