diff --git a/.travis.yml b/.travis.yml
index 2991694..02fb059 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,9 @@ matrix:
     # Linux GCC-4.6 debug static coveralls
     - compiler: gcc
       env: TRAVIS_BUILD_TYPE=Debug  TRAVIS_COVERALLS=ON
+    # Linux GCC-4.6 debug static google_double-conversion
+    - compiler: gcc
+      env: TRAVIS_BUILD_TYPE=Debug  TRAVIS_FLOAT2STR_LIB=google_doubleconversion
     # Linux GCC-4.6 debug dll c90
     - compiler: gcc
       env: TRAVIS_BUILD_TYPE=Debug  TRAVIS_SHARED_LIBS=ON  TRAVIS_STRICT_C90=ON
@@ -27,6 +30,10 @@ matrix:
     - os: osx
       compiler: clang
       env: TRAVIS_BUILD_TYPE=Debug
+    # OSX Clang debug static google_double-conversion
+    - os: osx
+      compiler: clang
+      env: TRAVIS_BUILD_TYPE=Debug  TRAVIS_FLOAT2STR_LIB=google_doubleconversion
     # OSX Clang debug dll c90
     - os: osx
       compiler: clang
diff --git a/appveyor.yml b/appveyor.yml
index b22f2ed..997f82b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -16,9 +16,11 @@ environment:
   matrix:
   - APPVEYOR_SHARED_LIBS: OFF
     APPVEYOR_CMAKE_GENERATOR: "Visual Studio 12 2013"
+    APPVEYOR_FLOAT2STR_LIB: std
 
   - APPVEYOR_SHARED_LIBS: ON
     APPVEYOR_CMAKE_GENERATOR: "Visual Studio 12 2013"
+    APPVEYOR_FLOAT2STR_LIB: google_doubleconversion
 
 build:
 
@@ -31,6 +33,7 @@ build_script:
          -DCMAKE_BUILD_TYPE=%CONFIGURATION% ^
          -DCMAKE_DEBUG_POSTFIX=_d ^
          -DGMIO_BUILD_SHARED_LIBS=%APPVEYOR_SHARED_LIBS% ^
+         -DGMIO_FLOAT2STR_LIB=%APPVEYOR_FLOAT2STR_LIB% ^
          -DGMIO_BUILD_EXAMPLES=ON   ^
          -DGMIO_BUILD_BENCHMARKS=ON ^
          -DGMIO_BUILD_BENCHMARK_ASSIMP=OFF ^
diff --git a/travis-build-script.sh b/travis-build-script.sh
index a1f945e..22cd0db 100644
--- a/travis-build-script.sh
+++ b/travis-build-script.sh
@@ -29,6 +29,10 @@ if [ -z "${TRAVIS_STRICT_C90}" ]; then
     export TRAVIS_STRICT_C90=OFF;
 fi
 
+if [ -z "${TRAVIS_FLOAT2STR_LIB}" ]; then
+    export TRAVIS_FLOAT2STR_LIB=std;
+fi
+
 # Run CMake
 mkdir build && cd build
 cmake --version
@@ -44,7 +48,8 @@ cmake .. -G "Unix Makefiles"       \
          -DGMIO_BUILD_BENCHMARK_ASSIMP=OFF             \
          -DGMIO_BUILD_BENCHMARK_OPENCASCADE=OFF        \
          -DGMIO_BUILD_TESTS_FAKE_SUPPORT=ON            \
-         -DGMIO_BUILD_TESTS_COVERAGE=$TRAVIS_COVERALLS
+         -DGMIO_BUILD_TESTS_COVERAGE=$TRAVIS_COVERALLS \
+         -DGMIO_FLOAT2STR_LIB=$TRAVIS_FLOAT2STR_LIB
 
 # Make
 make -j4