diff --git a/.gitignore b/.gitignore
index 82246d82..4cb62bea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,9 +3,11 @@ build/
 build_xcode/
 .sass-cache/
 
-# Built applications.
+# Built files at the top level.
 wren
 wrend
+libwren.a
+libwrend.a
 
 # XCode user-specific stuff.
 xcuserdata/
diff --git a/Makefile b/Makefile
index 43338050..9dc426d6 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,7 @@ SOURCES = $(wildcard src/*.c)
 HEADERS = $(wildcard src/*.h)
 OBJECTS = $(SOURCES:.c=.o)
 
+# Don't include main.c in the shared library.
 DEBUG_OBJECTS = $(subst build/debug/main.o,,$(addprefix build/debug/, $(notdir $(OBJECTS))))
 RELEASE_OBJECTS = $(subst build/release/main.o,,$(addprefix build/release/, $(notdir $(OBJECTS))))