diff --git a/prism/src/mtbdd/PM_StochTransient.cc b/prism/src/mtbdd/PM_StochTransient.cc
index a50e0269..5ddb6e85 100644
--- a/prism/src/mtbdd/PM_StochTransient.cc
+++ b/prism/src/mtbdd/PM_StochTransient.cc
@@ -48,7 +48,7 @@ jlong __jlongpointer rv,	// row vars
 jint num_rvars,
 jlong __jlongpointer cv,	// col vars
 jint num_cvars,
-jint time		// time
+jdouble time				// time
 )
 {
 	// cast function parameters