diff --git a/fann/src/CMakeLists.txt b/fann/src/CMakeLists.txt

index cbf8730..5451dc5 100644

--- a/fann/src/CMakeLists.txt

+++ b/fann/src/CMakeLists.txt

@@ -12,7 +12,7 @@ ADD_LIBRARY(floatfann SHARED ${floatfann_LIB_SRCS})

 SET_TARGET_PROPERTIES(floatfann PROPERTIES VERSION ${VERSION} SOVERSION 2 )

 INSTALL(TARGETS floatfann DESTINATION ${LIB_INSTALL_DIR} )

-

+target_link_libraries(floatfann m)

 ########### next target ###############

@@ -24,6 +24,7 @@ ADD_LIBRARY(doublefann SHARED ${doublefann_LIB_SRCS})

 SET_TARGET_PROPERTIES(doublefann PROPERTIES VERSION ${VERSION} SOVERSION 2 )

 INSTALL(TARGETS doublefann DESTINATION ${LIB_INSTALL_DIR} )

+target_link_libraries(doublefann m)

 ########### next target ###############

@@ -36,6 +37,7 @@ ADD_LIBRARY(fixedfann SHARED ${fixedfann_LIB_SRCS})

 SET_TARGET_PROPERTIES(fixedfann PROPERTIES VERSION ${VERSION} SOVERSION 2 )

 INSTALL(TARGETS fixedfann DESTINATION ${LIB_INSTALL_DIR} )

+target_link_libraries(fixedfann m)

 ########### next target ###############

@@ -48,4 +50,5 @@ ADD_LIBRARY(fann SHARED ${fann_LIB_SRCS})

 SET_TARGET_PROPERTIES(fann PROPERTIES VERSION ${VERSION} SOVERSION 2 )

 INSTALL(TARGETS fann DESTINATION ${LIB_INSTALL_DIR} )

+target_link_libraries(fann m)