diff --git a/REQUIRE b/REQUIRE
index 080bfb3..d59ce89 100644
--- a/REQUIRE
+++ b/REQUIRE
@@ -1,3 +1,3 @@
 julia 0.4
 BinDeps
-Compat 0.7.18
+Compat 0.7.20
diff --git a/deps/build.jl b/deps/build.jl
index d3d4e94..7897961 100644
--- a/deps/build.jl
+++ b/deps/build.jl
@@ -6,12 +6,12 @@ vers = "20U1"
 tagfile = "installed_vers"
 target = "libbid$(Sys.WORD_SIZE).$(Libdl.dlext)"
 if !isfile(tagfile) || !isfile(target) || readchomp(tagfile) != "$vers $(Sys.WORD_SIZE)"
-    if OS_NAME == :Windows
+    if Compat.KERNEL == :NT
         # binary for Windows was cross-compiled with mingw using:
         # 32-bit: CC_NAME_INDEX=3 CC_INDEX=3 _HOST_OS=Windows_NT _HOST_ARCH=x86 _NUM_CPUS=1 CC=i686-w64-mingw32-gcc CFLAGS_OPT="-O2 -DBID_THREAD=" CALL_BY_REF=0 GLOBAL_RND=1 GLOBAL_FLAGS=1 UNCHANGED_BINARY_FLAGS=1
         # 64-bit: CC_NAME_INDEX=3 CC_INDEX=3 _HOST_OS=Windows_NT _HOST_ARCH=x86_64 _NUM_CPUS=1 CC=x86_64-w64-mingw32-gcc CFLAGS_OPT="-O2 -DBID_THREAD=" CALL_BY_REF=0 GLOBAL_RND=1 GLOBAL_FLAGS=1 UNCHANGED_BINARY_FLAGS=1
         run(download_cmd("http://ab-initio.mit.edu/decfp/libbid$(Sys.WORD_SIZE)-$vers.dll", target))
-    elseif OS_NAME == :Darwin
+    elseif Compat.KERNEL == :Darwin
         run(download_cmd("http://ab-initio.mit.edu/decfp/libbid$(Sys.WORD_SIZE)-$vers.dylib", target))
     else
         tarball = "IntelRDFPMathLib$vers.tar.gz"