diff --git a/R/tmb-sim.R b/R/tmb-sim.R
index 5ec8ccb95..e81907f07 100644
--- a/R/tmb-sim.R
+++ b/R/tmb-sim.R
@@ -412,6 +412,9 @@ simulate.sdmTMB <- function(object, nsim = 1L, seed = sample.int(1e6, 1L),
   }
 
   ret <- do.call(cbind, ret)
+  if (!is.null(object$extra_time)) {
+    ret <- ret[seq(1, nrow(object$data)),,drop=FALSE] # drop extra time rows
+  }
   attr(ret, "type") <- type
   ret
 }
diff --git a/tests/testthat/test-tmb-simulation.R b/tests/testthat/test-tmb-simulation.R
index 21bbbe3fc..fe8851f5b 100644
--- a/tests/testthat/test-tmb-simulation.R
+++ b/tests/testthat/test-tmb-simulation.R
@@ -165,3 +165,21 @@ test_that("TMB breakpt sims work", {
   expect_lt(max(sim_dat$observed), 0.53)
   expect_gt(min(sim_dat$observed), -0.05)
 })
+
+test_that("simulate.sdmTMB returns the right length", {
+  skip_on_cran()
+  pcod$os <- rep(log(0.01), nrow(pcod)) # offset
+  m <- sdmTMB(
+    data = pcod,
+    formula = density ~ 0,
+    time_varying = ~ 1,
+    offset = pcod$os,
+    family = tweedie(link = "log"),
+    spatial = "off",
+    time = "year",
+    extra_time = c(2006, 2008, 2010, 2012, 2014, 2016),
+    spatiotemporal = "off"
+  )
+  s <- simulate(m, nsim = 2)
+  expect_equal(nrow(s), nrow(pcod))
+})