diff --git a/src/lib/mathlib/math/Matrix.hpp b/src/lib/mathlib/math/Matrix.hpp
index a39cca335b..b81f8868ec 100644
--- a/src/lib/mathlib/math/Matrix.hpp
+++ b/src/lib/mathlib/math/Matrix.hpp
@@ -375,7 +375,7 @@ public:
 			printf("[ ");
 
 			for (unsigned int j = 0; j < N; j++)
-				printf("%.3f\t", data[i][j]);
+				printf("%.3f\t", (double)data[i][j]);
 
 			printf(" ]\n");
 		}