diff --git a/src/sam/readrecord.jl b/src/sam/readrecord.jl
index 4bc0761..60252f6 100644
--- a/src/sam/readrecord.jl
+++ b/src/sam/readrecord.jl
@@ -28,9 +28,16 @@ const sam_machine_metainfo, sam_machine_record, sam_machine_header, sam_machine_
             key.actions[:enter] = [:pos2]
             key.actions[:exit]  = [:metainfo_dict_key]
             val = re"[ -~]+"
-            val.actions[:enter] = [:pos2]
-            val.actions[:exit]  = [:metainfo_dict_val]
-            keyval = cat(key, ':', val)
+            
+            # val.actions[:enter] = [:pos2]
+            # val.actions[:exit]  = [:metainfo_dict_val]
+            # keyval = cat(key, ':', val)
+
+            separator = re":"
+            separator.actions[:exit] = [:pos2]
+
+            keyval = cat(key, separator, opt(val))
+            keyval.actions[:exit]  = [:metainfo_dict_val]
 
             cat(keyval, rep(cat('\t', keyval)))
         end
diff --git a/test/test_sam.jl b/test/test_sam.jl
index e669757..cd9b74e 100644
--- a/test/test_sam.jl
+++ b/test/test_sam.jl
@@ -30,6 +30,19 @@
         @test metainfo["VN"] == "1.0"
         @test metainfo["SO"] == "coordinate"
         @test_throws KeyError metainfo["GO"]
+
+
+        metainfo = SAM.MetaInfo("@PG	ID:hisat2	PN:hisat2	VN:	CL:\"/script.sh\"")
+        @test haskey(metainfo, "ID")
+        @test haskey(metainfo, "PN")
+        # @test haskey(metainfo, "VN")
+        @test haskey(metainfo, "CL")
+
+        @test metainfo["ID"] == "hisat2"
+        @test metainfo["PN"] == "hisat2"
+        # @test metainfo["VN"] == ""
+        @test metainfo["CL"] == "\"/script.sh\""
+
     end
 
     @testset "Header" begin