diff --git a/libaf/filter.h b/libaf/filter.h
index 041c486c3e..a9ddbaa610 100644
--- a/libaf/filter.h
+++ b/libaf/filter.h
@@ -9,7 +9,7 @@
 */
 
 #if !defined MPLAYER_DSP_H
-# error "Never use \"filter.h\" directly; include \"dsp.h\" instead"
+# error Never use filter.h directly; include dsp.h instead.
 #endif
 
 #ifndef MPLAYER_FILTER_H
diff --git a/libaf/window.h b/libaf/window.h
index 52cd31622a..0a10a9cc96 100644
--- a/libaf/window.h
+++ b/libaf/window.h
@@ -16,7 +16,7 @@
 */
 
 #if !defined MPLAYER_DSP_H
-# error "Never use \"window.h\" directly; include \"dsp.h\" instead"
+# error Never use window.h directly; include dsp.h instead.
 #endif
 
 #ifndef MPLAYER_WINDOW_H