diff --git a/.travis.yml b/.travis.yml
index 367baf8618..ba8ff49a19 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -65,6 +65,9 @@ env:
     # The custom $PATH is just to pick up some extra binaries installed
     # through homebrew on macOS and it's completely harmless on Linux
     - PATH="/usr/local/opt/gettext/bin:/usr/local/opt/rpcgen/bin:$PATH"
+    # The hyperv driver fails to build with clang on precise due to this
+    # error being raised in one of openwsman header files
+    - CFLAGS="-Wno-error=variadic-macros"
     - VIR_TEST_DEBUG=1
 
 before_install: