diff --git a/.travis.yml b/.travis.yml
index 1303542..335567a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -394,7 +394,7 @@ install:
 script:
   - |-
     echo "using $TOOLSET : : $COMPILER ;" > ~/user-config.jam
-  - b2 libs/preprocessor/test$PPLIMITS -j 3 toolset=$TOOLSET cxxstd=$CXXSTD
+  - ./b2 libs/preprocessor/test$PPLIMITS -j 3 toolset=$TOOLSET cxxstd=$CXXSTD
 
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