diff --git a/ci/test.sh b/ci/test.sh
index 366bcc3..082ff58 100755
--- a/ci/test.sh
+++ b/ci/test.sh
@@ -18,6 +18,7 @@ fi
 ! ./vcddiff tests/counter.vcd tests/counter.var_reorder.no_diff.vcd | grep -q .
 ! ./vcddiff tests/counter.vcd tests/counter.identifier.no_diff.vcd | grep -q .
 ! ./vcddiff tests/counter.vcd tests/counter.scope_move.no_diff.vcd | grep -q .
+! ./vcddiff tests/counter_with_strings.vcd tests/counter_with_strings.identifier.no_diff.vcd | grep -q .
 if [ "$FIFO_SUPPORTED" = "1" ]; then
   ! ./vcddiff <(cat tests/counter.vcd) <(cat tests/counter.vcd) | grep -q .
 fi
@@ -30,6 +31,8 @@ fi
     grep "not defined in both files"
 ./vcddiff tests/counter.vcd tests/counter.new_sig.diff.vcd |
     grep "Ignoring signal t.the_sub.new_sig .* - not defined in both files"
+! ./vcddiff tests/counter_with_strings.vcd tests/counter_with_strings.value_change.diff.vcd |
+    grep "t.cyc_string (') differs at time 10"
 if [ "$FIFO_SUPPORTED" = "1" ]; then
   ./vcddiff <(cat tests/counter.vcd) <(cat tests/counter.end_time.diff.vcd) |
       grep "Files have different end times"
diff --git a/tests/counter.change_reorder.vcd b/tests/counter.change_reorder.no_diff.vcd
similarity index 100%
rename from tests/counter.change_reorder.vcd
rename to tests/counter.change_reorder.no_diff.vcd
diff --git a/tests/counter.identifier.vcd b/tests/counter.identifier.no_diff.vcd
similarity index 100%
rename from tests/counter.identifier.vcd
rename to tests/counter.identifier.no_diff.vcd
diff --git a/tests/counter.var_reorder.vcd b/tests/counter.var_reorder.no_diff.vcd
similarity index 100%
rename from tests/counter.var_reorder.vcd
rename to tests/counter.var_reorder.no_diff.vcd
diff --git a/tests/counter_with_strings.identifier.no_diff.vcd b/tests/counter_with_strings.identifier.no_diff.vcd
new file mode 100644
index 0000000..a853587
--- /dev/null
+++ b/tests/counter_with_strings.identifier.no_diff.vcd
@@ -0,0 +1,50 @@
+$date
+	Fri Nov 21 13:40:50 2025
+$end
+$version
+	Some Simulator
+$end
+$timescale
+	1ns
+$end
+
+$scope module t $end
+$var reg 1 ! clk $end
+$var integer 32 " cyc $end
+$var string 0 a cyc_string $end
+
+$scope module the_sub $end
+$var integer 32 # cyc $end
+$var integer 32 $ cyc_plus_one $end
+$upscope $end
+$upscope $end
+
+$scope begin std $end
+$upscope $end
+$enddefinitions $end
+#0
+$dumpvars
+0!
+b0 "
+b0 #
+b1 $
+szero a
+$end
+#10
+1!
+b1 "
+b1 #
+b10 $
+sone a
+#20
+0!
+#30
+1!
+b10 "
+b10 #
+b11 $
+stwo a
+#40
+0!
+#50
+1!
diff --git a/tests/counter_with_strings.value_change.diff.vcd b/tests/counter_with_strings.value_change.diff.vcd
new file mode 100644
index 0000000..4612e84
--- /dev/null
+++ b/tests/counter_with_strings.value_change.diff.vcd
@@ -0,0 +1,50 @@
+$date
+	Fri Nov 21 13:40:50 2025
+$end
+$version
+	Some Simulator
+$end
+$timescale
+	1ns
+$end
+
+$scope module t $end
+$var reg 1 ! clk $end
+$var integer 32 " cyc $end
+$var string 0 ' cyc_string $end
+
+$scope module the_sub $end
+$var integer 32 # cyc $end
+$var integer 32 $ cyc_plus_one $end
+$upscope $end
+$upscope $end
+
+$scope begin std $end
+$upscope $end
+$enddefinitions $end
+#0
+$dumpvars
+0!
+b0 "
+b0 #
+b1 $
+szero '
+$end
+#10
+1!
+b1 "
+b1 #
+b10 $
+sones '
+#20
+0!
+#30
+1!
+b10 "
+b10 #
+b11 $
+stwo '
+#40
+0!
+#50
+1!
diff --git a/tests/counter_with_strings.vcd b/tests/counter_with_strings.vcd
new file mode 100644
index 0000000..d419904
--- /dev/null
+++ b/tests/counter_with_strings.vcd
@@ -0,0 +1,50 @@
+$date
+	Fri Nov 21 13:40:50 2025
+$end
+$version
+	Some Simulator
+$end
+$timescale
+	1ns
+$end
+
+$scope module t $end
+$var reg 1 ! clk $end
+$var integer 32 " cyc $end
+$var string 0 ' cyc_string $end
+
+$scope module the_sub $end
+$var integer 32 # cyc $end
+$var integer 32 $ cyc_plus_one $end
+$upscope $end
+$upscope $end
+
+$scope begin std $end
+$upscope $end
+$enddefinitions $end
+#0
+$dumpvars
+0!
+b0 "
+b0 #
+b1 $
+szero '
+$end
+#10
+1!
+b1 "
+b1 #
+b10 $
+sone '
+#20
+0!
+#30
+1!
+b10 "
+b10 #
+b11 $
+stwo '
+#40
+0!
+#50
+1!
diff --git a/vcddiff.c b/vcddiff.c
index 6880d88..9f25451 100644
--- a/vcddiff.c
+++ b/vcddiff.c
@@ -279,6 +279,7 @@ static struct variable_types_t var_types[]
       {"realtime", REALTIME},  // GTKWave's fst2vcd
       {"reg", REG},
       {"shortint", SHORTINT},  // GTKWave's fst2vcd
+      {"string", STRING},  // GTKWave's fst2vcd
       {"supply0", SUPPLY0},
       {"supply1", SUPPLY1},
       {"time", TIME},
@@ -892,9 +893,10 @@ static int get_nxt_chg(FILE* fp, char* fname, int* sigcode, int* bit, char* valu
          }
          return (SCALAR);
          break;
-         /* vector or real cases */
+         /* vector, real, or string cases */
       case 'b':
       case 'r':
+      case 's':
          strncpy(value, line, MAXTOKSIZE);
          get_token(fp, token);
          *sigcode = VERILOG_ID_TO_POS(token);
diff --git a/vcddiff.h b/vcddiff.h
index 143451e..6df8bfa 100755
--- a/vcddiff.h
+++ b/vcddiff.h
@@ -45,20 +45,21 @@
 #define REALTIME 11
 #define REG 12
 #define SHORTINT 13
-#define SUPPLY0 14
-#define SUPPLY1 15
-#define TIME 16
-#define TRI 17
-#define TRI0 18
-#define TRI1 19
-#define TRIAND 20
-#define TRIOR 21
-#define TRIREG 22
-#define WAND 23
-#define WIRE 24
-#define WOR 25
+#define STRING 14
+#define SUPPLY0 15
+#define SUPPLY1 16
+#define TIME 17
+#define TRI 18
+#define TRI0 19
+#define TRI1 20
+#define TRIAND 21
+#define TRIOR 22
+#define TRIREG 23
+#define WAND 24
+#define WIRE 25
+#define WOR 26
 
-#define UNDEFINED 26
+#define UNDEFINED 27
 
 /*dumpfile key words*/
 #define V_ATTRBEGIN 1