diff --git a/install.sh b/install.sh
index bff211c..6fe4b4f 100755
--- a/install.sh
+++ b/install.sh
@@ -3,7 +3,7 @@
 { # this ensures the entire script is downloaded #
 
 nvm_has() {
-  type "$1" > /dev/null 2>&1
+  command which "${1-}" > /dev/null 2>&1
 }
 
 nvm_install_dir() {
diff --git a/nvm.sh b/nvm.sh
index 544245d..a056703 100755
--- a/nvm.sh
+++ b/nvm.sh
@@ -36,7 +36,7 @@ nvm_grep() {
 }
 
 nvm_has() {
-  type "${1-}" > /dev/null 2>&1
+  command which "${1-}" > /dev/null 2>&1
 }
 
 nvm_is_alias() {
diff --git a/test/fast/Unit tests/nvm_has b/test/fast/Unit tests/nvm_has
index c1a3b59..dc0260c 100755
--- a/test/fast/Unit tests/nvm_has	
+++ b/test/fast/Unit tests/nvm_has	
@@ -4,9 +4,9 @@ die () { echo "$@" ; exit 1; }
 
 \. ../../../nvm.sh
 
-nvm_has cat && type cat > /dev/null || die 'nvm_has locates "cat" properly'
+nvm_has cat && command which cat > /dev/null || die 'nvm_has locates "cat" properly'
 
 [ "~$(nvm_has foobarbaz 2>&1)" = "~" ] || die "nvm_has does not suppress error output"
 
-! nvm_has foobarbaz && ! type foobarbaz >/dev/null 2>&1 || die "nvm_has does not return a nonzero exit code when not found"
+! nvm_has foobarbaz && ! command which foobarbaz >/dev/null 2>&1 || die "nvm_has does not return a nonzero exit code when not found"