diff --git a/configure.ac b/configure.ac
index 5e9a556c..257cb3ce 100644
--- a/configure.ac
+++ b/configure.ac
@@ -47,7 +47,7 @@ PKG_CHECK_MODULES([TSS2_TCTILDR],[tss2-tctildr])
 PKG_CHECK_MODULES([TSS2_RC],[tss2-rc])
 AC_ARG_VAR([GDBUS_CODEGEN],[The gdbus-codegen executable.])
 AC_CHECK_PROG([GDBUS_CODEGEN], [gdbus-codegen], [gdbus-codegen])
-AS_IF([test ! -x "$(which $GDBUS_CODEGEN)"],
+AS_IF([test ! -x "$(type -p $GDBUS_CODEGEN)"],
       [AC_MSG_ERROR([*** gdbus-codegen is required to build tpm2-abrmd])])
 
 # Check OS and set library and compile flags accordingly