diff --git a/resources/imap/saslplugin/CMakeLists.txt b/resources/imap/saslplugin/CMakeLists.txt
--- a/resources/imap/saslplugin/CMakeLists.txt
+++ b/resources/imap/saslplugin/CMakeLists.txt
@@ -15,6 +15,7 @@
 )
 
 add_library(kdexoauth2 SHARED ${kdexoauth2sasl_SRCS})
+target_include_directories(kdexoauth2 PRIVATE ${Sasl2_INCLUDE_DIRS})
 set_target_properties(kdexoauth2 PROPERTIES
     C_VISIBILITY_PRESET default
     SOVERSION 3