diff --git a/korundum/rubylib/korundum/configure.in.in b/korundum/rubylib/korundum/configure.in.in
index 29769f10..d2c4928c 100644
--- a/korundum/rubylib/korundum/configure.in.in
+++ b/korundum/rubylib/korundum/configure.in.in
@@ -26,6 +26,18 @@ else
         RUBY_CFLAGS=`$PKGCONFIG ruby-2.0 --cflags`
       fi
     fi
+    if test -z "$RUBY_VERSION"; then
+      RUBY_VERSION=`$PKGCONFIG ruby-2.1 --modversion 2>/dev/null`
+      if test -n "$RUBY_VERSION"; then
+        RUBY_CFLAGS=`$PKGCONFIG ruby-2.1 --cflags`
+      fi
+    fi
+    if test -z "$RUBY_VERSION"; then
+      RUBY_VERSION=`$PKGCONFIG ruby-2.2 --modversion 2>/dev/null`
+      if test -n "$RUBY_VERSION"; then
+        RUBY_CFLAGS=`$PKGCONFIG ruby-2.2 --cflags`
+      fi
+    fi
     if test -z "$RUBY_VERSION"; then
       # pkgconfig file does not exist but might be 1.9.1: RUBY_VERSION defined in ruby/version.h
       if test -n "$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"rubyhdrdir"@:>@)'"; then
diff --git a/qtruby/rubylib/qtruby/configure.in.in b/qtruby/rubylib/qtruby/configure.in.in
index a381e839..f17f03b3 100644
--- a/qtruby/rubylib/qtruby/configure.in.in
+++ b/qtruby/rubylib/qtruby/configure.in.in
@@ -32,6 +32,12 @@ else
         RUBY_CFLAGS=`$PKGCONFIG ruby-2.1 --cflags`
       fi
     fi
+    if test -z "$RUBY_VERSION"; then
+      RUBY_VERSION=`$PKGCONFIG ruby-2.2 --modversion 2>/dev/null`
+      if test -n "$RUBY_VERSION"; then
+        RUBY_CFLAGS=`$PKGCONFIG ruby-2.2 --cflags`
+      fi
+    fi
     if test -z "$RUBY_VERSION"; then
       # pkgconfig file does not exist but might be 1.9.1: RUBY_VERSION defined in ruby/version.h
       if test -n "$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"rubyhdrdir"@:>@)'"; then