diff --git a/src/runningstats/runningstats.pyx b/src/runningstats/runningstats.pyx
index a537505d49a093e3ef757e9ced28c3e2e70d95b9..d68fb5093c2376c980d0c181153296014e59358a 100644
--- a/src/runningstats/runningstats.pyx
+++ b/src/runningstats/runningstats.pyx
@@ -25,7 +25,7 @@ cdef extern from "runningstats.h":
         float*&,
         uint32_t,
         double*&,
-        double*&);
+        double*&)
 
 cpdef compute_stats(
     np.ndarray[np.float32_t] data,