diff --git a/src/occBootLoader/img_defs.mk b/src/occBootLoader/img_defs.mk
index fe8859d1..9437ce08 100644
--- a/src/occBootLoader/img_defs.mk
+++ b/src/occBootLoader/img_defs.mk
@@ -5,8 +5,9 @@
 #
 # OpenPOWER OnChipController Project
 #
-# Contributors Listed Below - COPYRIGHT 2015,2017
+# Contributors Listed Below - COPYRIGHT 2015,2019
 # [+] International Business Machines Corp.
+# [+] Timothy Pearson
 #
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -226,7 +227,8 @@ PIPE-CFLAGS = -pipe -Wa,-m405
 GCC-CFLAGS += -g -Wall -fsigned-char -msoft-float  \
 	-m32 -mbig-endian -mcpu=405 -mmultiple -mstring \
 	-meabi -msdata=eabi -ffreestanding -fno-common \
-	-fno-inline-functions-called-once -std=gnu89
+	-fno-inline-functions-called-once \
+	-fno-asynchronous-unwind-tables -std=gnu89
 
 CFLAGS      =  -c $(GCC-CFLAGS) $(PIPE-CFLAGS) $(GCC-O-LEVEL) $(INCLUDES)
 
diff --git a/src/occ_405/img_defs.mk b/src/occ_405/img_defs.mk
index c68c91c4..0a674395 100644
--- a/src/occ_405/img_defs.mk
+++ b/src/occ_405/img_defs.mk
@@ -5,8 +5,9 @@
 #
 # OpenPOWER OnChipController Project
 #
-# Contributors Listed Below - COPYRIGHT 2015,2017
+# Contributors Listed Below - COPYRIGHT 2015,2019
 # [+] International Business Machines Corp.
+# [+] Timothy Pearson
 #
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -253,7 +254,8 @@ PIPE-CFLAGS = -pipe -Wa,-m405
 GCC-CFLAGS += -g -Wall -fsigned-char -msoft-float  \
 	-m32 -mbig-endian -mcpu=405 -mmultiple -mstring \
 	-meabi -msdata=eabi -ffreestanding -fno-common \
-	-fno-inline-functions-called-once -std=gnu89
+	-fno-inline-functions-called-once \
+	-fno-asynchronous-unwind-tables -std=gnu89
 
 CFLAGS      =  -c $(GCC-CFLAGS) $(PIPE-CFLAGS) $(GCC-O-LEVEL) $(INCLUDES)
 
diff --git a/src/occ_gpe0/img_defs.mk b/src/occ_gpe0/img_defs.mk
index 15ff9ac1..37bbe5b2 100644
--- a/src/occ_gpe0/img_defs.mk
+++ b/src/occ_gpe0/img_defs.mk
@@ -5,7 +5,7 @@
 #
 # OpenPOWER OnChipController Project
 #
-# Contributors Listed Below - COPYRIGHT 2015,2018
+# Contributors Listed Below - COPYRIGHT 2015,2019
 # [+] International Business Machines Corp.
 #
 #
@@ -209,6 +209,7 @@ GCC-CFLAGS += -msdata=eabi
 GCC-CFLAGS += -ffreestanding
 GCC-CFLAGS += -fno-common
 GCC-CFLAGS += -fno-inline-functions-called-once
+GCC-CFLAGS += -fno-asynchronous-unwind-tables
 
 CFLAGS      =  -c -std=gnu89 $(GCC-CFLAGS) $(PIPE-CFLAGS) $(GCC-O-LEVEL) $(INCLUDES)
 
diff --git a/src/occ_gpe1/img_defs.mk b/src/occ_gpe1/img_defs.mk
index b705145a..03d92f80 100644
--- a/src/occ_gpe1/img_defs.mk
+++ b/src/occ_gpe1/img_defs.mk
@@ -5,7 +5,7 @@
 #
 # OpenPOWER OnChipController Project
 #
-# Contributors Listed Below - COPYRIGHT 2015,2018
+# Contributors Listed Below - COPYRIGHT 2015,2019
 # [+] International Business Machines Corp.
 #
 #
@@ -216,6 +216,7 @@ GCC-CFLAGS += -meabi
 GCC-CFLAGS += -ffreestanding
 GCC-CFLAGS += -fno-common
 GCC-CFLAGS += -fno-inline-functions-called-once
+GCC-CFLAGS += -fno-asynchronous-unwind-tables
 GCC-CFLAGS += -std=gnu89
 
 CFLAGS      =  -c $(GCC-CFLAGS) $(PIPE-CFLAGS) $(GCC-O-LEVEL) $(INCLUDES)