diff --git a/.travis.yml b/.travis.yml
index 661ebda1..bb97aaaa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,12 @@ addons:
     packages:
       - libgmp-dev
 
+after_failure:
+  - "find . -name mkmf.log -exec cat {} \\;"
+
+after_success:
+  - "find . -name mkmf.log -exec cat {} \\;"
+
 env:
   - USE_MINI_PORTILE=true
   - USE_MINI_PORTILE=false
diff --git a/ext/sqlite3/extconf.rb b/ext/sqlite3/extconf.rb
index bdd56995..3d46c1c9 100644
--- a/ext/sqlite3/extconf.rb
+++ b/ext/sqlite3/extconf.rb
@@ -64,6 +64,12 @@ def asplode missing
 asplode('sqlite3.h')  unless find_header  'sqlite3.h'
 find_library 'pthread', 'pthread_create' # 1.8 support. *shrug*
 
+have_library 'dl'
+
+%w{ dlopen dlclose dlsym }.each do |func|
+  abort "missing function #{func}" unless have_func(func)
+end
+
 if with_config('sqlcipher')
   asplode('sqlcipher') unless find_library 'sqlcipher', 'sqlite3_libversion_number'
 else