diff --git a/doc/Makefile.am b/doc/Makefile.am
index e38e879..ba6f64c 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -26,7 +26,7 @@
 	done
 
 	$(INSTALL) -d $(DESTDIR)$(mandir)/man3
-	cd man && find man3 -type f \
+	cd man && find man3 -type f -name opus_*.3 \
 		  -exec $(INSTALL_DATA) \{} $(DESTDIR)$(mandir)/man3 \;
 
 clean-local: