diff --git a/doc/ffmpeg-doc.texi b/doc/ffmpeg-doc.texi
index d28bddf070..2f5527c09c 100644
--- a/doc/ffmpeg-doc.texi
+++ b/doc/ffmpeg-doc.texi
@@ -805,7 +805,7 @@ the libraries.
 @item For AMR NB fixed-point download TS26.073 REL-6 V6.0.0 from
 @url{http://www.3gpp.org/ftp/Specs/archive/26_series/26.073/26073-600.zip}
 and extract the source to the directory @file{libavcodec/amr}.
-You must also add @code{-DMMS_IO} from @code{CFLAGS} in
+You must also add @code{-DMMS_IO} to @code{CFLAGS} in
 @file{libavcodec/amr/makefile}, i.e.
 ``@code{CFLAGS = -Wall -pedantic-errors -I. $(CFLAGS_$(MODE)) -D$(VAD) -DMMS_IO}''.