diff --git a/man8/ld.so.8 b/man8/ld.so.8
index e7defeb6a..82f8ede3e 100644
--- a/man8/ld.so.8
+++ b/man8/ld.so.8
@@ -321,7 +321,8 @@ in the chapter
 .TP
 .B LD_BIND_NOT
 (glibc since 2.1.95)
-Do not update the GOT (global offset table) and PLT (procedure linkage table)
+If this environment variable is set to a nonempty string,
+do not update the GOT (global offset table) and PLT (procedure linkage table)
 after resolving a symbol.
 .TP
 .B LD_DEBUG
@@ -350,7 +351,8 @@ is ignored in secure-execution mode.
 .TP
 .B LD_DYNAMIC_WEAK
 (glibc since 2.1.91)
-Allow weak symbols to be overridden (reverting to old glibc behavior).
+If this environment variable is defined (with any value),
+allow weak symbols to be overridden (reverting to old glibc behavior).
 .\" See weak handling
 .\"     https://www.sourceware.org/ml/libc-hacker/2000-06/msg00029.html
 .\"     To: GNU libc hacker <libc-hacker at sourceware dot cygnus dot com>