diff --git a/base/run/printf.run b/base/run/printf.run
new file mode 100644
index 0000000000..b015bc494d
--- /dev/null
+++ b/base/run/printf.run
@@ -0,0 +1,32 @@
+build "core init test/printf"
+
+create_boot_directory
+
+install_config {
+	<config>
+		<parent-provides>
+			<service name="ROM"/>
+			<service name="RAM"/>
+			<service name="CPU"/>
+			<service name="RM"/>
+			<service name="CAP"/>
+			<service name="PD"/>
+			<service name="SIGNAL"/>
+			<service name="LOG"/>
+		</parent-provides>
+		<default-route>
+			<any-service> <parent/> </any-service>
+		</default-route>
+		<start name="test-printf">
+			<resource name="RAM" quantum="10M"/>
+		</start>
+	</config>
+}
+
+build_boot_image "core init test-printf"
+
+append qemu_args "-nographic -m 64"
+
+run_genode_until {-1 = -1 = -1} 10
+
+puts "Test succeeded"
diff --git a/base/src/base/console/console.cc b/base/src/base/console/console.cc
index cd9313fb1f..9f050961d3 100644
--- a/base/src/base/console/console.cc
+++ b/base/src/base/console/console.cc
@@ -276,7 +276,7 @@ void Console::vprintf(const char *format, va_list list)
 				case Format_command::LONG:
 
 					numeric_arg = (cmd.type == Format_command::UINT) ?
-						va_arg(list, unsigned long) : va_arg(list, long);
+						(long long)va_arg(list, unsigned long) : va_arg(list, long);
 					break;
 
 				case Format_command::SIZE_T:
@@ -287,7 +287,7 @@ void Console::vprintf(const char *format, va_list list)
 				case Format_command::DEFAULT:
 
 					numeric_arg = (cmd.type == Format_command::UINT) ?
-						va_arg(list, unsigned int) : va_arg(list, int);
+						(long long)va_arg(list, unsigned int) : va_arg(list, int);
 					break;
 			}
 		}
diff --git a/base/src/test/printf/main.cc b/base/src/test/printf/main.cc
new file mode 100644
index 0000000000..e0eb1e0201
--- /dev/null
+++ b/base/src/test/printf/main.cc
@@ -0,0 +1,22 @@
+/*
+ * \brief  Testing 'printf()' with negative integer
+ * \author Christian Prochaska
+ * \date   2012-04-20
+ *
+ */
+
+/*
+ * Copyright (C) 2012 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU General Public License version 2.
+ */
+
+#include <base/printf.h>
+
+int main(int argc, char **argv)
+{
+	Genode::printf("-1 = %d = %ld\n", -1, -1L);
+
+	return 0;
+}
diff --git a/base/src/test/printf/target.mk b/base/src/test/printf/target.mk
new file mode 100644
index 0000000000..3bcfb4eb36
--- /dev/null
+++ b/base/src/test/printf/target.mk
@@ -0,0 +1,3 @@
+TARGET   = test-printf
+SRC_CC   = main.cc
+LIBS     = env