diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 5205ccb..28eec9b 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -41,7 +41,10 @@
 TARGET_LINK_LIBRARIES(curve_fitting ceres)
 
 ADD_EXECUTABLE(curve_fitting_c curve_fitting.c)
-TARGET_LINK_LIBRARIES(curve_fitting_c ceres)
+# As this is a C file #including <math.h> we have to explicitly add the math
+# library (libm). Although some compilers (dependent upon options) will accept
+# the indirect link to libm via Ceres, at least GCC 4.8 on pure Debian won't.
+TARGET_LINK_LIBRARIES(curve_fitting_c ceres m)
 
 
 ADD_EXECUTABLE(robust_curve_fitting robust_curve_fitting.cc)