diff --git a/man/rustc.1 b/man/rustc.1
index f49faf2ec6e..00d698e611e 100644
--- a/man/rustc.1
+++ b/man/rustc.1
@@ -68,7 +68,7 @@ AST nodes and blocks with IDs), or flowgraph=<nodeid> (graphviz
 formatted flowgraph for node)
 .TP
 \fB\-\-dep-info\fR [FILENAME]
-Output dependency info to <filename> after compiling, in o format suitable
+Output dependency info to <filename> after compiling, in a format suitable
 for use by Makefiles.
 .TP
 \fB\-\-sysroot\fR PATH