diff --git a/libcobj/app/src/main/java/jp/osscons/opensourcecobol/libcobj/data/CobolNumericField.java b/libcobj/app/src/main/java/jp/osscons/opensourcecobol/libcobj/data/CobolNumericField.java
index 8cefebec..b05705b0 100644
--- a/libcobj/app/src/main/java/jp/osscons/opensourcecobol/libcobj/data/CobolNumericField.java
+++ b/libcobj/app/src/main/java/jp/osscons/opensourcecobol/libcobj/data/CobolNumericField.java
@@ -475,11 +475,7 @@ public int getSign() {
         if (attr.isFlagSignSeparate()) {
             return value == 0x2b ? 1 : -1;
         } else {
-            if (0x30 <= value && value <= 0x39) {
-                return 1;
-            }
-            if (value == 0x20) {
-                this.getDataStorage().setByte(p, (byte) 0x30);
+            if (value == 0x20 || (0x30 <= value && value <= 0x39)) {
                 return 1;
             }
 
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 484aee23..32c2049f 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -223,7 +223,8 @@ misc_DEPENDENCIES = \
 	misc.src/file-handler-japanese.at \
 	misc.src/perform-until-div.at \
 	misc.src/search-occurs-depending.at \
-	misc.src/fix-subtract.at
+	misc.src/fix-subtract.at \
+	misc.src/display-numeric-NUMERIC-class.at
 
 EXTRA_DIST = $(srcdir)/package.m4 \
 	$(TESTS) \
diff --git a/tests/Makefile.in b/tests/Makefile.in
index 3ed18bdd..9c1bfa5c 100644
--- a/tests/Makefile.in
+++ b/tests/Makefile.in
@@ -762,7 +762,8 @@ misc_DEPENDENCIES = \
 	misc.src/file-handler-japanese.at \
 	misc.src/perform-until-div.at \
 	misc.src/search-occurs-depending.at \
-	misc.src/fix-subtract.at
+	misc.src/fix-subtract.at \
+	misc.src/display-numeric-NUMERIC-class.at
 
 EXTRA_DIST = $(srcdir)/package.m4 \
 	$(TESTS) \
diff --git a/tests/misc.at b/tests/misc.at
index 93fa8085..1ac799e7 100644
--- a/tests/misc.at
+++ b/tests/misc.at
@@ -53,3 +53,4 @@ m4_include([file-handler-japanese.at])
 m4_include([perform-until-div.at])
 m4_include([search-occurs-depending.at])
 m4_include([fix-subtract.at])
+m4_include([display-numeric-NUMERIC-class.at])
diff --git a/tests/misc.src/display-numeric-NUMERIC-class.at b/tests/misc.src/display-numeric-NUMERIC-class.at
new file mode 100644
index 00000000..b3273abf
--- /dev/null
+++ b/tests/misc.src/display-numeric-NUMERIC-class.at
@@ -0,0 +1,32 @@
+AT_SETUP([DISPLAY numeric after NUMERIC class testing])
+
+AT_DATA([prog.cbl], [
+       IDENTIFICATION   DIVISION.
+       PROGRAM-ID.      prog.
+       DATA             DIVISION.
+       WORKING-STORAGE SECTION.
+       01  N-REC.
+           03  N-VAL PIC 9.
+       PROCEDURE DIVISION.
+       MAIN-PROC.
+      *************************************************************
+           MOVE SPACE TO N-REC.
+           DISPLAY "N-VAL: '" N-VAL "'".
+           
+           IF N-VAL NUMERIC
+               DISPLAY "N-VAL is numeric"
+           ELSE
+               DISPLAY "N-VAL is not numeric"
+           END-IF.
+
+           DISPLAY "N-VAL: '" N-VAL "'".
+])
+
+AT_CHECK([${COBJ} prog.cbl])
+AT_CHECK([java prog], [0], 
+[N-VAL: ' ' 
+N-VAL is not numeric
+N-VAL: ' ' 
+])
+
+AT_CLEANUP
\ No newline at end of file