diff --git a/CMakeLists.txt b/CMakeLists.txt
index 957ae54e1a5b7ec871352b6872b77df25814960e..8a2d1042b05134306a9e26cbe65170f6c45ebcad 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -53,6 +53,24 @@ FIND_PATH(LIBCORPUS2_SRC_DATA_DIR
 )
 MARK_AS_ADVANCED(LIBCORPUS2_SRC_DATA_DIR)
 
+# For DLLs on Windows (aka SHARED libraries) you have to explicitly
+# specify the external API of the library. Nothing is exported
+# by default.
+# For UNIX on the other hand everything is exported by default.
+# We were building libraries SHARED but without specyfing
+# external API. It worked on UNIX but not on Windows.
+# This is changed now so add_library entries do not specify library
+# type and therefore use default. Below, the default is set
+# to build SHARED libs on anything but WIN32, so for Windows/cygwin
+# we are building STATIC (todo: is cygwin ok w/o externs?)
+# To make DLLs on Windows, exports have to be defined and then
+# add_library entry changed to state SHARED for given library.
+# Once this is done for all libraries, and all are marked
+# explicitly as SHARED, the below will won't make a difference.
+if(NOT WIN32)
+    set(BUILD_SHARED_LIBS TRUE)
+endif(NOT WIN32)
+
 add_subdirectory(libpwrutils)
 add_subdirectory(libcorpus2)
 add_subdirectory(tagset-tool)
diff --git a/libcorpus2/CMakeLists.txt b/libcorpus2/CMakeLists.txt
index ae39d3bdfe9bbf5d54ed1875b7ab0db9c40e3c42..b9d669fb4d17380f4db36802ffc00897b302713c 100644
--- a/libcorpus2/CMakeLists.txt
+++ b/libcorpus2/CMakeLists.txt
@@ -68,7 +68,7 @@ SET(libcorpus2_STAT_SRC
 
 file(GLOB_RECURSE INCS "*.h")
 
-add_library(corpus2 SHARED ${libcorpus2_STAT_SRC} ${INCS})
+add_library(corpus2 ${libcorpus2_STAT_SRC} ${INCS})
 target_link_libraries(corpus2 ${LIBS})
 set_target_properties(corpus2 PROPERTIES
 	VERSION "${corpus2_ver_major}.${corpus2_ver_minor}"
diff --git a/libpwrutils/CMakeLists.txt b/libpwrutils/CMakeLists.txt
index 84cbcc82e00246161e30dfcbe933624669c54daa..0e969a0a2f418c7db12c1a6abb8aa492c51464ad 100644
--- a/libpwrutils/CMakeLists.txt
+++ b/libpwrutils/CMakeLists.txt
@@ -34,7 +34,7 @@ SET(libpwrutils_STAT_SRC
 
 file(GLOB_RECURSE INCS "*.h")
 
-add_library(pwrutils SHARED ${libpwrutils_STAT_SRC} ${INCS})
+add_library(pwrutils ${libpwrutils_STAT_SRC} ${INCS})
 target_link_libraries(pwrutils ${LIBS} )
 set_target_properties(pwrutils PROPERTIES
 	VERSION "${pwrutils_ver_major}.${pwrutils_ver_minor}"