diff --git a/resources/3rdparty/CMakeLists.txt b/resources/3rdparty/CMakeLists.txt
index 33fee5585..f3aef9594 100644
--- a/resources/3rdparty/CMakeLists.txt
+++ b/resources/3rdparty/CMakeLists.txt
@@ -206,10 +206,10 @@ if (STORM_USE_GUROBI)
             list(APPEND STORM_DEP_TARGETS Gurobi_SHARED)
         else()
             # The FindGurobi.cmake script needs to be updated every now and then as the library file contains the version number...
-            message(SEND_ERROR "Gurobi Library ${GUROBI_LIBRARY} not found. If your Gurobi Version is higher then 8.1.0, please contact the Storm developers.")
+            message(FATAL_ERROR "Gurobi Library ${GUROBI_LIBRARY} not found. If your Gurobi Version is higher then 8.1.0, please contact the Storm developers.")
         endif()
     else()
-        message(SEND_ERROR "Gurobi Library requested but was not found. Make sure that GUROBI_ROOT points to the correct directory (containing include/ and lib/ subdirectories).")
+        message(FATAL_ERROR "Gurobi Library requested but was not found. Make sure that GUROBI_ROOT points to the correct directory (containing include/ and lib/ subdirectories).")
     endif()
 else()
     set(STORM_HAVE_GUROBI OFF)
@@ -243,17 +243,17 @@ endif()
 if(carl_FOUND AND NOT STORM_FORCE_SHIPPED_CARL)
     get_target_property(carlLOCATION lib_carl LOCATION)
     if("${carlLOCATION}" STREQUAL "carlLOCATION-NOTFOUND")
-        message(SEND_ERROR "Library location for carl is not found, did you build carl?")
+        message(FATAL_ERROR "Library location for carl is not found, did you build carl?")
     elseif(EXISTS ${carlLOCATION})
         #empty on purpose
     else()
-        message(SEND_ERROR "File ${carlLOCATION} does not exist, did you build carl?")
+        message(FATAL_ERROR "File ${carlLOCATION} does not exist, did you build carl?")
     endif()
     if("${carl_VERSION_MAJOR}" STREQUAL "${CARL_C14VERSION}")
         message(STATUS "Storm - Found carl using master14 branch.")
         # empty on purpose. Maybe put a warning here?
     elseif("${carl_VERSION_MAJOR}.${carl_VERSION_MINOR}" VERSION_LESS "${CARL_MINVERSION}")
-    	message(SEND_ERROR "Carl outdated, require ${CARL_MINVERSION}, have ${carl_VERSION}")
+        message(FATAL_ERROR "Carl outdated, require ${CARL_MINVERSION}, have ${carl_VERSION}")
     endif()
 
     set(STORM_SHIPPED_CARL OFF)