diff --git a/src/modules/Math/math_module.h b/src/modules/Math/math_module.h
index c68f65cae7c16d14b240755995158a7300544f76..659a70a92c58586c5a46036a5cecc4403de15589 100644
--- a/src/modules/Math/math_module.h
+++ b/src/modules/Math/math_module.h
@@ -1,2 +1,2 @@
-void init_math_matrix();
+extern void init_math_matrix();