diff --git a/configure b/configure
index 9e7090c7906..9712446d24c 100755
--- a/configure
+++ b/configure
@@ -10315,7 +10315,7 @@ 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 ff3163f921a..1720b9bfbee 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2861,7 +2861,7 @@ 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