diff --git a/src/check-def.sh b/src/check-def.sh
index 9008c58..f6e0d79 100755
--- a/src/check-def.sh
+++ b/src/check-def.sh
@@ -3,7 +3,7 @@
 LC_ALL=C
 export LC_ALL
 
-if which nm 2>/dev/null >/dev/null; then
+if command -v nm 2>/dev/null >/dev/null; then
 	:
 else
 	echo "'nm' not found; skipping test"
diff --git a/src/check-plt.sh b/src/check-plt.sh
index 5a9dae1..41c35aa 100755
--- a/src/check-plt.sh
+++ b/src/check-plt.sh
@@ -3,7 +3,7 @@
 LC_ALL=C
 export LC_ALL
 
-if which readelf 2>/dev/null >/dev/null; then
+if command -v readelf 2>/dev/null >/dev/null; then
 	:
 else
 	echo "'readelf' not found; skipping test"