diff --git a/CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf b/CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf
index f29445ce34..0d81db2fbd 100644
--- a/CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf
+++ b/CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf
@@ -96,8 +96,6 @@
   #
   MSFT:*_*_*_CC_FLAGS = /wd4090
 
-  GCC:*_GCC44_IA32_CC_FLAGS = "-D__cdecl=__attribute__((cdecl))" "-D__declspec(t)=__attribute__((t))"
-
   # -JCryptoPkg/Include : To disable the use of the system includes provided by RVCT
   # --diag_remark=1     : Reduce severity of "#1-D: last line of file ends without a newline"
   RVCT:*_*_ARM_CC_FLAGS = -JCryptoPkg/Include --diag_remark=1
diff --git a/CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf b/CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf
index e7b4b2f618..4bcf064c56 100644
--- a/CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf
+++ b/CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf
@@ -93,8 +93,6 @@
   #
   MSFT:*_*_*_CC_FLAGS = /wd4090 /wd4718
 
-  GCC:*_GCC44_IA32_CC_FLAGS = "-D__cdecl=__attribute__((cdecl))" "-D__declspec(t)=__attribute__((t))"
-
   # -JCryptoPkg/Include : To disable the use of the system includes provided by RVCT
   # --diag_remark=1     : Reduce severity of "#1-D: last line of file ends without a newline"
   RVCT:*_*_ARM_CC_FLAGS = -JCryptoPkg/Include --diag_remark=1
diff --git a/CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf b/CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf
index 32628c8835..a6e433f6ce 100644
--- a/CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf
+++ b/CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf
@@ -102,8 +102,6 @@
   #
   MSFT:*_*_*_CC_FLAGS = /wd4090
 
-  GCC:*_GCC44_IA32_CC_FLAGS = "-D__cdecl=__attribute__((cdecl))" "-D__declspec(t)=__attribute__((t))"
-
   # -JCryptoPkg/Include : To disable the use of the system includes provided by RVCT
   # --diag_remark=1     : Reduce severity of "#1-D: last line of file ends without a newline"
   RVCT:*_*_ARM_CC_FLAGS = -JCryptoPkg/Include --diag_remark=1
diff --git a/CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf b/CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
index 4829669c1f..c34699cd62 100644
--- a/CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
+++ b/CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
@@ -100,5 +100,4 @@
   #
   MSFT:*_*_*_CC_FLAGS = /wd4090
 
-  GCC:*_GCC44_IA32_CC_FLAGS = "-D__cdecl=__attribute__((cdecl))" "-D__declspec(t)=__attribute__((t))"
   XCODE:*_*_*_CC_FLAGS = -mmmx -msse