diff --git a/crypto/o_str.c b/crypto/o_str.c
index 59cc25094..56104a6c3 100644
--- a/crypto/o_str.c
+++ b/crypto/o_str.c
@@ -60,7 +60,9 @@
 #include <e_os.h>
 #include "o_str.h"
 
-#if !defined(OPENSSL_IMPLEMENTS_strncasecmp) && !defined(OPENSSL_SYSNAME_WIN32)
+#if !defined(OPENSSL_IMPLEMENTS_strncasecmp) && \
+    !defined(OPENSSL_SYSNAME_WIN32) && \
+    !defined(NETWARE_CLIB)
 # include <strings.h>
 #endif