diff --git a/src/util/afsutil_prototypes.h b/src/util/afsutil_prototypes.h
index ded6e666da..58c7b6acc6 100644
--- a/src/util/afsutil_prototypes.h
+++ b/src/util/afsutil_prototypes.h
@@ -149,7 +149,7 @@ extern int parseNetFiles(afs_uint32 addrbuf[], afs_uint32 maskbuf[],
 
 
 /* pthread_threadname.c */
-#if AFS_PTHREAD_ENV && !defined(AFS_NT40_ENV)
+#if defined(AFS_PTHREAD_ENV) && !defined(AFS_NT40_ENV)
 extern void afs_pthread_setname(pthread_t thread, const char *threadname);
 extern void afs_pthread_setname_self(const char *threadname);
 #elif defined(AFS_NT40_ENV)
diff --git a/src/util/pthread_threadname.c b/src/util/pthread_threadname.c
index 1c6827209e..fbb2b8048d 100644
--- a/src/util/pthread_threadname.c
+++ b/src/util/pthread_threadname.c
@@ -28,7 +28,7 @@
 
 #include "afsutil.h"
 
-#if AFS_PTHREAD_ENV && !defined(AFS_NT40_ENV)
+#if defined(AFS_PTHREAD_ENV) && !defined(AFS_NT40_ENV)
 # include <pthread.h>
 # ifdef HAVE_PTHREAD_NP_H
 #  include <pthread_np.h>