diff --git a/Include/pymath.h b/Include/pymath.h
index d35c87c..b234f97 100644
--- a/Include/pymath.h
+++ b/Include/pymath.h
@@ -43,7 +43,7 @@
 extern double copysign(double, double);
 #endif
 
-/* High precision defintion of pi and e (Euler)
+/* High precision definition of pi and e (Euler)
  * The values are taken from libc6's math.h.
  */
 #ifndef Py_MATH_PIl