diff --git a/R/facet-wrap.r b/R/facet-wrap.r
index 8cfaaadf93..78c112751e 100644
--- a/R/facet-wrap.r
+++ b/R/facet-wrap.r
@@ -307,8 +307,9 @@ FacetWrap <- ggproto("FacetWrap", Facet,
       col_panels <- which(layout$ROW > first_row & layout$COL == first_col)
       col_pos <- convertInd(layout$ROW[col_panels], layout$COL[col_panels], nrow)
       col_axes <- axes$y$right[layout$SCALE_Y[col_panels]]
+      inside <- (theme$strip.placement %||% "inside") == "inside"
       if (params$strip.position == "bottom" &&
-          theme$strip.placement != "inside" &&
+          !inside &&
           any(!vapply(row_axes, is.zero, logical(1))) &&
           !params$free$x) {
         warning("Suppressing axis rendering when strip.position = 'bottom' and strip.placement == 'outside'", call. = FALSE)
@@ -316,7 +317,7 @@ FacetWrap <- ggproto("FacetWrap", Facet,
         axis_mat_x_bottom[row_pos] <- row_axes
       }
       if (params$strip.position == "right" &&
-          theme$strip.placement != "inside" &&
+          !inside &&
           any(!vapply(col_axes, is.zero, logical(1))) &&
           !params$free$y) {
         warning("Suppressing axis rendering when strip.position = 'right' and strip.placement == 'outside'", call. = FALSE)
@@ -334,33 +335,33 @@ FacetWrap <- ggproto("FacetWrap", Facet,
     strip_mat <- empty_table
     strip_mat[panel_pos] <- unlist(unname(strips), recursive = FALSE)[[params$strip.position]]
     if (params$strip.position %in% c("top", "bottom")) {
-      inside <- (theme$strip.placement.x %||% theme$strip.placement %||% "inside") == "inside"
+      inside_x <- (theme$strip.placement.x %||% theme$strip.placement %||% "inside") == "inside"
       if (params$strip.position == "top") {
-        placement <- if (inside) -1 else -2
+        placement <- if (inside_x) -1 else -2
         strip_pad <- axis_height_top
       } else {
-        placement <- if (inside) 0 else 1
+        placement <- if (inside_x) 0 else 1
         strip_pad <- axis_height_bottom
       }
       strip_height <- unit(apply(strip_mat, 1, max_height, value_only = TRUE), "cm")
       panel_table <- weave_tables_row(panel_table, strip_mat, placement, strip_height, strip_name, 2, coord$clip)
-      if (!inside) {
+      if (!inside_x) {
         strip_pad[as.numeric(strip_pad) != 0] <- strip_padding
         panel_table <- weave_tables_row(panel_table, row_shift = placement, row_height = strip_pad)
       }
     } else {
-      inside <- (theme$strip.placement.y %||% theme$strip.placement %||% "inside") == "inside"
+      inside_y <- (theme$strip.placement.y %||% theme$strip.placement %||% "inside") == "inside"
       if (params$strip.position == "left") {
-        placement <- if (inside) -1 else -2
+        placement <- if (inside_y) -1 else -2
         strip_pad <- axis_width_left
       } else {
-        placement <- if (inside) 0 else 1
+        placement <- if (inside_y) 0 else 1
         strip_pad <- axis_width_right
       }
       strip_pad[as.numeric(strip_pad) != 0] <- strip_padding
       strip_width <- unit(apply(strip_mat, 2, max_width, value_only = TRUE), "cm")
       panel_table <- weave_tables_col(panel_table, strip_mat, placement, strip_width, strip_name, 2, coord$clip)
-      if (!inside) {
+      if (!inside_y) {
         strip_pad[as.numeric(strip_pad) != 0] <- strip_padding
         panel_table <- weave_tables_col(panel_table, col_shift = placement, col_width = strip_pad)
       }