diff --git a/configure b/configure
index 0e97c5228df105..a7d2975f1f5e81 100755
--- a/configure
+++ b/configure
@@ -9895,7 +9895,7 @@ then
 		# small for the default recursion limit. Increase the stack size
 		# to ensure that tests don't crash
     stack_size="1000000"  # 16 MB
-    if test "$with_ubsan" == "yes"
+    if test "$with_ubsan" = "yes"
     then
         # Undefined behavior sanitizer requires an even deeper stack
         stack_size="4000000"  # 64 MB
diff --git a/configure.ac b/configure.ac
index 9151059f8946fa..5aa91cbad35551 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2816,7 +2816,7 @@ then
 		# small for the default recursion limit. Increase the stack size
 		# to ensure that tests don't crash
     stack_size="1000000"  # 16 MB
-    if test "$with_ubsan" == "yes"
+    if test "$with_ubsan" = "yes"
     then
         # Undefined behavior sanitizer requires an even deeper stack
         stack_size="4000000"  # 64 MB