diff --git a/unit_tests/CMakeLists.txt b/unit_tests/CMakeLists.txt
index 452a73ece9..0e424dbd7f 100644
--- a/unit_tests/CMakeLists.txt
+++ b/unit_tests/CMakeLists.txt
@@ -186,7 +186,10 @@ if(WIN32)
     file(TO_NATIVE_PATH $<TARGET_FILE:BZip2::BZip2>                             LIBBZ2)
     file(TO_NATIVE_PATH $<TARGET_FILE:PCRE2::pcre2>                             LIBPCRE2)
     file(TO_NATIVE_PATH $<TARGET_FILE:LibXml2::LibXml2>                         LIBXML2)
-    file(TO_NATIVE_PATH $<TARGET_FILE:CURL::libcurl>                            LIBCURL)
+    if(NOT ENABLE_LIBCLAMAV_ONLY)
+        # libcurl not used by libclamav and so is not defined in libclamav-only mode.
+        file(TO_NATIVE_PATH $<TARGET_FILE:CURL::libcurl>                            LIBCURL)
+    endif()
     file(TO_NATIVE_PATH $<TARGET_FILE:JSONC::jsonc>                             LIBJSONC)
     file(TO_NATIVE_PATH $<TARGET_FILE:PThreadW32::pthreadw32>                   LIBPTHREADW32)
     file(TO_NATIVE_PATH $<TARGET_FILE:ClamAV::win32_compat>                     LIBWIN32COMPAT)
@@ -245,7 +248,10 @@ else()
     set(LIBBZ2             $<TARGET_FILE:BZip2::BZip2>)
     set(LIBPCRE2           $<TARGET_FILE:PCRE2::pcre2>)
     set(LIBXML2            $<TARGET_FILE:LibXml2::LibXml2>)
-    set(LIBCURL            $<TARGET_FILE:CURL::libcurl>)
+    if(NOT ENABLE_LIBCLAMAV_ONLY)
+        # libcurl not used by libclamav and so is not defined in libclamav-only mode.
+        set(LIBCURL            $<TARGET_FILE:CURL::libcurl>)
+    endif()
     set(LIBJSONC           $<TARGET_FILE:JSONC::jsonc>)
     if(Iconv_FOUND AND NOT Iconv_IS_BUILT_IN)
         set(LIBICONV           ${Iconv_LIBRARIES})