diff --git a/klee.spec b/klee.spec
index 77b9ff7..d5d8d8f 100644
--- a/klee.spec
+++ b/klee.spec
@@ -19,6 +19,8 @@
 
 %define version_unconverted 1.3.0+20170221
 
+%define with_uclibc 1
+
 Name:           klee
 Summary:        LLVM Execution Engine
 License:        NCSA
@@ -36,6 +38,9 @@ BuildRequires:  clang%{llvm_version}
 BuildRequires:  cmake
 BuildRequires:  flex
 BuildRequires:  gperftools-devel
+%if %{with_uclibc}
+BuildRequires:  klee-uclibc
+%endif
 BuildRequires:  libacl-devel
 BuildRequires:  libcap-devel
 BuildRequires:  libselinux-devel
@@ -71,6 +76,11 @@ information on what KLEE is and what it can do, see the OSDI 2008 paper.
 	-DENABLE_SYSTEM_TESTS=OFF \
 	-DCMAKE_C_FLAGS="%optflags" \
 	-DCMAKE_CXX_FLAGS="%optflags" \
+%if %{with_uclibc}
+	-DENABLE_POSIX_RUNTIME=ON \
+	-DENABLE_KLEE_UCLIBC=ON \
+	-DKLEE_UCLIBC_PATH=%{_libdir}/klee-uclibc/ \
+%endif
 	-DBUILD_SHARED_LIBS:BOOL=OFF
 %make_jobs