diff --git a/lib/plsql/procedure.rb b/lib/plsql/procedure.rb
index 25f6b33..f1bd945 100644
--- a/lib/plsql/procedure.rb
+++ b/lib/plsql/procedure.rb
@@ -397,6 +397,9 @@ def get_field_definitions(argument_metadata) # :nodoc:
 
           col_no, col_name, col_type_name, col_length, col_precision, col_scale, col_char_length, col_char_used = r
 
+          # remove precision (n) from data_type (returned for TIMESTAMPs and INTERVALs)
+          col_type_name = col_type_name.sub(/\(\d+\)/, "")
+
           fields[col_name.downcase.to_sym] = {
             position: col_no.to_i,
             data_type: col_type_name,
diff --git a/spec/plsql/procedure_spec.rb b/spec/plsql/procedure_spec.rb
index 581c32e..3e8392d 100644
--- a/spec/plsql/procedure_spec.rb
+++ b/spec/plsql/procedure_spec.rb
@@ -2427,6 +2427,44 @@ def new_candidate(status)
   end
 end
 
+describe "Function with TIMESTAMP columns in %ROWTYPE" do
+  before(:all) do
+    plsql.connect! CONNECTION_PARAMS
+    plsql.execute "DROP FUNCTION test_timestamp_fn" rescue nil
+    plsql.execute "DROP TABLE test_timestamp_tbl" rescue nil
+    plsql.execute <<-SQL
+      CREATE TABLE test_timestamp_tbl (
+        id NUMBER,
+        ts TIMESTAMP,
+        ts_tz TIMESTAMP WITH TIME ZONE,
+        ts_ltz TIMESTAMP WITH LOCAL TIME ZONE
+      )
+    SQL
+    plsql.execute <<-SQL
+      CREATE OR REPLACE FUNCTION test_timestamp_fn(p_rec test_timestamp_tbl%ROWTYPE)
+        RETURN NUMBER
+      IS
+      BEGIN
+        RETURN p_rec.id;
+      END;
+    SQL
+  end
+
+  after(:all) do
+    plsql.execute "DROP FUNCTION test_timestamp_fn" rescue nil
+    plsql.execute "DROP TABLE test_timestamp_tbl" rescue nil
+    plsql.logoff
+  end
+
+  it "should strip precision from TIMESTAMP data types in %ROWTYPE fields" do
+    procedure = PLSQL::Procedure.find(plsql, :test_timestamp_fn)
+    fields = procedure.arguments[0][:p_rec][:fields]
+    expect(fields[:ts][:data_type]).to eq("TIMESTAMP")
+    expect(fields[:ts_tz][:data_type]).to eq("TIMESTAMP WITH TIME ZONE")
+    expect(fields[:ts_ltz][:data_type]).to eq("TIMESTAMP WITH LOCAL TIME ZONE")
+  end
+end
+
 describe "Function with TABLE OF %ROWTYPE parameter defined in package" do
   before(:all) do
     plsql.connect! CONNECTION_PARAMS