diff --git a/ext/standard/string.c b/ext/standard/string.c
index 8f137e950b0..f4bb26005d8 100644
--- a/ext/standard/string.c
+++ b/ext/standard/string.c
@@ -592,14 +592,12 @@ PHP_FUNCTION(nl_langinfo)
 #endif
 #ifdef DECIMAL_POINT
 		case DECIMAL_POINT:
-#endif
-#ifdef RADIXCHAR
+#elif defined(RADIXCHAR)
 		case RADIXCHAR:
 #endif
 #ifdef THOUSANDS_SEP
 		case THOUSANDS_SEP:
-#endif
-#ifdef THOUSEP
+#elif defined(THOUSEP)
 		case THOUSEP:
 #endif
 #ifdef GROUPING