diff --git a/src/mmath/hmatrix.nim b/src/mmath/hmatrix.nim
index 002dd9c..0161707 100644
--- a/src/mmath/hmatrix.nim
+++ b/src/mmath/hmatrix.nim
@@ -3,6 +3,8 @@ from hvector import HVector, newHVector, buildHVector
 from pivot import HPivot, newHPivot, `[]`, `[]=`, len
 from error import SizeError, SingularMatrixError
 from math import sqrt
+import constant
+
 
 type
   HMatrix*[T] = object
diff --git a/src/mmath/smatrix.nim b/src/mmath/smatrix.nim
index 80ee321..0438ccd 100644
--- a/src/mmath/smatrix.nim
+++ b/src/mmath/smatrix.nim
@@ -3,6 +3,7 @@ from svector import SVector
 from pivot import SPivot, newSPivot, `[]`, `[]=`, len
 from error import SizeError, SingularMatrixError
 from math import sqrt
+import constant
 
 type
   SMatrix*[ROWS, COLUMNS: static[int], T] = object