diff --git a/R/plot.hdi.R b/R/plot.hdi.R
index dae9b18b7..490289b24 100644
--- a/R/plot.hdi.R
+++ b/R/plot.hdi.R
@@ -108,7 +108,7 @@ data_plot.bayestestR_eti <- data_plot.hdi
   groups <- unique(dataplot$y)
   if (!show_intercept) {
     dataplot <- .remove_intercept(dataplot, column = "y", show_intercept)
-    groups <- unique(setdiff(groups, .intercepts()))
+    groups <- unique(setdiff(groups, .intercept_names))
   }
 
   if (length(groups) == 1) {
diff --git a/R/plot.p_direction.R b/R/plot.p_direction.R
index d8e5d9d88..112c7b19b 100644
--- a/R/plot.p_direction.R
+++ b/R/plot.p_direction.R
@@ -95,7 +95,7 @@ data_plot.p_direction <- function(x, data = NULL, show_intercept = FALSE, ...) {
   groups <- unique(dataplot$y)
   if (!show_intercept) {
     dataplot <- .remove_intercept(dataplot, column = "y", show_intercept)
-    groups <- unique(setdiff(groups, .intercepts()))
+    groups <- unique(setdiff(groups, .intercept_names))
   }
 
   if (length(groups) == 1) {
diff --git a/R/plot.p_significance.R b/R/plot.p_significance.R
index d47a8423a..216f617f8 100644
--- a/R/plot.p_significance.R
+++ b/R/plot.p_significance.R
@@ -103,7 +103,7 @@ data_plot.p_significance <- function(x,
   groups <- unique(dataplot$y)
   if (!show_intercept) {
     dataplot <- .remove_intercept(dataplot, column = "y", show_intercept)
-    groups <- unique(setdiff(groups, .intercepts()))
+    groups <- unique(setdiff(groups, .intercept_names))
   }
 
   if (length(groups) == 1) {
diff --git a/R/plot.rope.R b/R/plot.rope.R
index 9ed3d46a4..dd7b71493 100644
--- a/R/plot.rope.R
+++ b/R/plot.rope.R
@@ -42,7 +42,7 @@ data_plot.rope <- function(x, data = NULL, show_intercept = FALSE, ...) {
   groups <- unique(dataplot$y)
   if (!show_intercept) {
     dataplot <- .remove_intercept(dataplot, column = "y", show_intercept = show_intercept)
-    groups <- unique(setdiff(groups, .intercepts()))
+    groups <- unique(setdiff(groups, .intercept_names))
   }
 
   if (length(groups) == 1) {
diff --git a/R/utils.R b/R/utils.R
index 9a3e312b3..2b0360238 100644
--- a/R/utils.R
+++ b/R/utils.R
@@ -113,7 +113,7 @@
 
 
 
-.intercepts <- function() {
+.intercept_names <-
   c(
     "(intercept)_zi",
     "intercept (zero-inflated)",
@@ -123,12 +123,11 @@
     "b_intercept",
     "b_zi_intercept"
   )
-}
 
 
 .is_intercept <- function(x) {
   x <- tolower(x)
-  x %in% .intercepts() | grepl("intercept", x)
+  x %in% .intercept_names | grepl("(?i)intercept[^a-zA-Z]", x)
 }
 
 .remove_intercept <- function(x, column = "Parameter", show_intercept = FALSE) {