diff --git a/repos/base/mk/generic.mk b/repos/base/mk/generic.mk
index a67c445396..e76d713b79 100644
--- a/repos/base/mk/generic.mk
+++ b/repos/base/mk/generic.mk
@@ -75,7 +75,7 @@ endif
 # We need to override these to build the ada runtime
 #
 CUSTOM_ADA_MAKE    ?= $(GNATMAKE)
-CUSTOM_ADA_FLAGS   ?= -q -c --GCC=$(CC) --RTS=$(ADA_RTS)
+CUSTOM_ADA_FLAGS   ?= -q -c --GCC=$(ADA_CC) --RTS=$(ADA_RTS)
 CUSTOM_ADA_OPT     ?= -cargs $(CC_ADA_OPT)
 CUSTOM_ADA_INCLUDE ?= -I- $(INCLUDES)
 
diff --git a/repos/base/mk/global.mk b/repos/base/mk/global.mk
index bb92edd566..84dba1c6ce 100644
--- a/repos/base/mk/global.mk
+++ b/repos/base/mk/global.mk
@@ -24,6 +24,7 @@ CUSTOM_RANLIB   ?= $(CROSS_DEV_PREFIX)ranlib
 CUSTOM_STRIP    ?= $(CROSS_DEV_PREFIX)strip
 CUSTOM_GNATMAKE ?= $(CROSS_DEV_PREFIX)gnatmake
 CUSTOM_HOST_CC  ?= gcc
+CUSTOM_ADA_CC   ?= $(CUSTOM_CC)
 
 #
 # GNU utilities
@@ -51,6 +52,7 @@ RANLIB   = $(CUSTOM_RANLIB)
 STRIP    = $(CUSTOM_STRIP)
 GNATMAKE = $(CUSTOM_GNATMAKE)
 HOST_CC  = $(CUSTOM_HOST_CC)
+ADA_CC   = $(CUSTOM_ADA_CC)
 
 #
 # Nim toolchain