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-rw-r--r--apps/plugins/calculator.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/apps/plugins/calculator.c b/apps/plugins/calculator.c
index 942f031890..c19d6bbc5b 100644
--- a/apps/plugins/calculator.c
+++ b/apps/plugins/calculator.c
@@ -102,6 +102,9 @@ PLUGIN_HEADER
#define X_5_POS (X_4_POS + REC_WIDTH) /* x5 = 110, column 111 left blank */
#define SIGN(x) ((x)<0?-1:1)
+#ifndef ABS
+#define ABS(a) (((a) < 0) ? -(a) : (a))
+#endif
/* variable button definitions */
#if CONFIG_KEYPAD == RECORDER_PAD