diff --git a/example/debug_function.cpp b/example/debug_function.cpp
index 7589450..033f5c3 100644
--- a/example/debug_function.cpp
+++ b/example/debug_function.cpp
@@ -8,6 +8,7 @@
 #include <signal.h>     // ::signal
 #include <boost/stacktrace/frame.hpp>
 #include <iostream>     // std::cerr
+#include <cstdlib>      // std::exit
 
 void print_signal_handler_and_exit() {
     void* p = reinterpret_cast<void*>(::signal(SIGSEGV, SIG_DFL));
diff --git a/include/boost/stacktrace/detail/addr2line_impls.hpp b/include/boost/stacktrace/detail/addr2line_impls.hpp
index 30d0799..8299e4f 100644
--- a/include/boost/stacktrace/detail/addr2line_impls.hpp
+++ b/include/boost/stacktrace/detail/addr2line_impls.hpp
@@ -16,7 +16,6 @@
 #include <boost/stacktrace/detail/try_demangle.hpp>
 #include <boost/lexical_cast.hpp>
 
-#include <dlfcn.h>
 #include <execinfo.h>
 #include <cstdio>
 
diff --git a/include/boost/stacktrace/detail/location_from_symbol.hpp b/include/boost/stacktrace/detail/location_from_symbol.hpp
index 6008d4d..7faf26a 100644
--- a/include/boost/stacktrace/detail/location_from_symbol.hpp
+++ b/include/boost/stacktrace/detail/location_from_symbol.hpp
@@ -50,7 +50,7 @@ public:
         file_name_[0] = '\0';
 
         boost::detail::winapi::MEMORY_BASIC_INFORMATION_ mbi;
-        if (!boost::detail::winapi::VirtualQuery(ptr, &mbi, sizeof(mbi))) {
+        if (!boost::detail::winapi::VirtualQuery(addr, &mbi, sizeof(mbi))) {
             return;
         }