diff --git a/.travis.yml b/.travis.yml
index 88ad183..f01922c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,8 @@ python:
   - 2.7
   - 3.4
   - 3.5
+  - 3.6
+  - 3.7
 notifications:
   email: false
  
diff --git a/wafo/source/mvn/mvndst.f b/wafo/source/mvn/mvndst.f
index ab259c0..93423b0 100644
--- a/wafo/source/mvn/mvndst.f
+++ b/wafo/source/mvn/mvndst.f
@@ -131,7 +131,8 @@ C f2py mvn.pyf mvndst.f -c --fcompiler=gnu95 --compiler=mingw32 -lmsvcr71
          VALUE = 0
          ERROR = 1
       ELSE
-         INFORM = MVNDNT(N, CORREL, LOWER, UPPER, INFIN, INFIS, D, E)
+         INFORM = INT(MVNDNT(N, CORREL, LOWER, UPPER, INFIN, INFIS,
+     &                       D, E))
          IF ( N-INFIS .EQ. 0 ) THEN
             VALUE = 1
             ERROR = 0
@@ -260,6 +261,8 @@ C f2py mvn.pyf mvndst.f -c --fcompiler=gnu95 --compiler=mingw32 -lmsvcr71
       DOUBLE PRECISION SUMSQ, AJ, BJ, SUM, SQTWPI, EPS, D, E
       DOUBLE PRECISION CVDIAG, AMIN, BMIN, DMIN, EMIN, YL, YU
       PARAMETER ( SQTWPI = 2.506628274631001D0, EPS = 1D-10 )
+      AMIN = 0
+      BMIN = 0
       IJ = 0
       II = 0
       INFIS = 0