diff --git a/man/mono.1 b/man/mono.1
index c4589ea70c72..08a93ac91823 100644
--- a/man/mono.1
+++ b/man/mono.1
@@ -332,6 +332,12 @@ Currently this merely ensures that you are running either the
 \fBMONO_ENV_OPTIONS\fR environment variable to force all of your child
 processes to use one particular kind of GC with the Mono runtime.
 .TP
+\fB--gc-debug=[options]\fR
+Command line equivalent of the \fBMONO_GC_DEBUG\fR environment variable.
+.TP
+\fB--gc-params=[options]\fR
+Command line equivalent of the \fBMONO_GC_PARAMS\fR environment variable.
+.TP
 \fB--arch=32\fR, \fB--arch=64\fR
 (Mac OS X only): Selects the bitness of the Mono binary used, if
 available. If the binary used is already for the selected bitness, nothing